feat: add S3-compatible storage provider (MinIO, Ceph, R2, etc.)

Adds a new 'S3-Compatible Storage' provider that works with any
S3-API-compatible object storage service, including MinIO, Ceph,
Cloudflare R2, Backblaze B2, and others.

Changes:
- New provider class: classes/providers/storage/s3-compatible-provider.php
  - Provider key: s3compatible
  - Reads user-configured endpoint URL from settings
  - Uses path-style URL access (required by most S3-compatible services)
  - Supports credentials via AS3CF_S3COMPAT_ACCESS_KEY_ID /
    AS3CF_S3COMPAT_SECRET_ACCESS_KEY wp-config.php constants
  - Disables AWS-specific features (Block Public Access, Object Ownership)
- New provider SVG icons (s3compatible.svg, -link.svg, -round.svg)
- Registered provider in main plugin class with endpoint setting support
- Updated StorageProviderSubPage to show endpoint URL input for S3-compatible
- Built pro settings bundle with rollup (Svelte 4.2.19)
- Added package.json and updated rollup.config.mjs for pro-only builds

vendor/Gcp/symfony/polyfill-php80/LICENSE

@@ -0,0 +1,19 @@
+Copyright (c) 2020-present Fabien Potencier
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is furnished
+to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

vendor/Gcp/symfony/polyfill-php80/Php80.php

@@ -0,0 +1,107 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace DeliciousBrains\WP_Offload_Media\Gcp\Symfony\Polyfill\Php80;
+
+/**
+ * @author Ion Bazan <ion.bazan@gmail.com>
+ * @author Nico Oelgart <nicoswd@gmail.com>
+ * @author Nicolas Grekas <p@tchwork.com>
+ *
+ * @internal
+ */
+final class Php80
+{
+    public static function fdiv(float $dividend, float $divisor) : float
+    {
+        return @($dividend / $divisor);
+    }
+    public static function get_debug_type($value) : string
+    {
+        switch (\true) {
+            case null === $value:
+                return 'null';
+            case \is_bool($value):
+                return 'bool';
+            case \is_string($value):
+                return 'string';
+            case \is_array($value):
+                return 'array';
+            case \is_int($value):
+                return 'int';
+            case \is_float($value):
+                return 'float';
+            case \is_object($value):
+                break;
+            case $value instanceof \__PHP_Incomplete_Class:
+                return '__PHP_Incomplete_Class';
+            default:
+                if (null === ($type = @\get_resource_type($value))) {
+                    return 'unknown';
+                }
+                if ('Unknown' === $type) {
+                    $type = 'closed';
+                }
+                return "resource ({$type})";
+        }
+        $class = \get_class($value);
+        if (\false === \strpos($class, '@')) {
+            return $class;
+        }
+        return ((\get_parent_class($class) ?: \key(\class_implements($class))) ?: 'class') . '@anonymous';
+    }
+    public static function get_resource_id($res) : int
+    {
+        if (!\is_resource($res) && null === @\get_resource_type($res)) {
+            throw new \TypeError(\sprintf('Argument 1 passed to get_resource_id() must be of the type resource, %s given', \get_debug_type($res)));
+        }
+        return (int) $res;
+    }
+    public static function preg_last_error_msg() : string
+    {
+        switch (\preg_last_error()) {
+            case \PREG_INTERNAL_ERROR:
+                return 'Internal error';
+            case \PREG_BAD_UTF8_ERROR:
+                return 'Malformed UTF-8 characters, possibly incorrectly encoded';
+            case \PREG_BAD_UTF8_OFFSET_ERROR:
+                return 'The offset did not correspond to the beginning of a valid UTF-8 code point';
+            case \PREG_BACKTRACK_LIMIT_ERROR:
+                return 'Backtrack limit exhausted';
+            case \PREG_RECURSION_LIMIT_ERROR:
+                return 'Recursion limit exhausted';
+            case \PREG_JIT_STACKLIMIT_ERROR:
+                return 'JIT stack limit exhausted';
+            case \PREG_NO_ERROR:
+                return 'No error';
+            default:
+                return 'Unknown error';
+        }
+    }
+    public static function str_contains(string $haystack, string $needle) : bool
+    {
+        return '' === $needle || \false !== \strpos($haystack, $needle);
+    }
+    public static function str_starts_with(string $haystack, string $needle) : bool
+    {
+        return 0 === \strncmp($haystack, $needle, \strlen($needle));
+    }
+    public static function str_ends_with(string $haystack, string $needle) : bool
+    {
+        if ('' === $needle || $needle === $haystack) {
+            return \true;
+        }
+        if ('' === $haystack) {
+            return \false;
+        }
+        $needleLength = \strlen($needle);
+        return $needleLength <= \strlen($haystack) && 0 === \substr_compare($haystack, $needle, -$needleLength);
+    }
+}

vendor/Gcp/symfony/polyfill-php80/PhpToken.php

@@ -0,0 +1,90 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace DeliciousBrains\WP_Offload_Media\Gcp\Symfony\Polyfill\Php80;
+
+/**
+ * @author Fedonyuk Anton <info@ensostudio.ru>
+ *
+ * @internal
+ */
+class PhpToken implements \Stringable
+{
+    /**
+     * @var int
+     */
+    public $id;
+    /**
+     * @var string
+     */
+    public $text;
+    /**
+     * @var int
+     */
+    public $line;
+    /**
+     * @var int
+     */
+    public $pos;
+    public function __construct(int $id, string $text, int $line = -1, int $position = -1)
+    {
+        $this->id = $id;
+        $this->text = $text;
+        $this->line = $line;
+        $this->pos = $position;
+    }
+    public function getTokenName() : ?string
+    {
+        if ('UNKNOWN' === ($name = \token_name($this->id))) {
+            $name = \strlen($this->text) > 1 || \ord($this->text) < 32 ? null : $this->text;
+        }
+        return $name;
+    }
+    /**
+     * @param int|string|array $kind
+     */
+    public function is($kind) : bool
+    {
+        foreach ((array) $kind as $value) {
+            if (\in_array($value, [$this->id, $this->text], \true)) {
+                return \true;
+            }
+        }
+        return \false;
+    }
+    public function isIgnorable() : bool
+    {
+        return \in_array($this->id, [\T_WHITESPACE, \T_COMMENT, \T_DOC_COMMENT, \T_OPEN_TAG], \true);
+    }
+    public function __toString() : string
+    {
+        return (string) $this->text;
+    }
+    /**
+     * @return static[]
+     */
+    public static function tokenize(string $code, int $flags = 0) : array
+    {
+        $line = 1;
+        $position = 0;
+        $tokens = \token_get_all($code, $flags);
+        foreach ($tokens as $index => $token) {
+            if (\is_string($token)) {
+                $id = \ord($token);
+                $text = $token;
+            } else {
+                [$id, $text, $line] = $token;
+            }
+            $tokens[$index] = new static($id, $text, $line, $position);
+            $position += \strlen($text);
+        }
+        return $tokens;
+    }
+}

vendor/Gcp/symfony/polyfill-php80/Resources/stubs/Attribute.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace DeliciousBrains\WP_Offload_Media\Gcp;
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+#[Attribute(Attribute::TARGET_CLASS)]
+final class Attribute
+{
+    public const TARGET_CLASS = 1;
+    public const TARGET_FUNCTION = 2;
+    public const TARGET_METHOD = 4;
+    public const TARGET_PROPERTY = 8;
+    public const TARGET_CLASS_CONSTANT = 16;
+    public const TARGET_PARAMETER = 32;
+    public const TARGET_ALL = 63;
+    public const IS_REPEATABLE = 64;
+    /** @var int */
+    public $flags;
+    public function __construct(int $flags = self::TARGET_ALL)
+    {
+        $this->flags = $flags;
+    }
+}

vendor/Gcp/symfony/polyfill-php80/Resources/stubs/PhpToken.php

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+<?php
+
+namespace DeliciousBrains\WP_Offload_Media\Gcp;
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+if (\PHP_VERSION_ID < 80000 && \extension_loaded('tokenizer')) {
+    class PhpToken extends Symfony\Polyfill\Php80\PhpToken
+    {
+    }
+}

vendor/Gcp/symfony/polyfill-php80/Resources/stubs/Stringable.php

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+<?php
+
+namespace DeliciousBrains\WP_Offload_Media\Gcp;
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+if (\PHP_VERSION_ID < 80000) {
+    interface Stringable
+    {
+        /**
+         * @return string
+         */
+        public function __toString();
+    }
+}

vendor/Gcp/symfony/polyfill-php80/Resources/stubs/UnhandledMatchError.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace DeliciousBrains\WP_Offload_Media\Gcp;
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+if (\PHP_VERSION_ID < 80000) {
+    class UnhandledMatchError extends \Error
+    {
+    }
+}

vendor/Gcp/symfony/polyfill-php80/Resources/stubs/ValueError.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace DeliciousBrains\WP_Offload_Media\Gcp;
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+if (\PHP_VERSION_ID < 80000) {
+    class ValueError extends \Error
+    {
+    }
+}

vendor/Gcp/symfony/polyfill-php80/bootstrap.php

@@ -0,0 +1,61 @@
+<?php
+
+namespace DeliciousBrains\WP_Offload_Media\Gcp;
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+use DeliciousBrains\WP_Offload_Media\Gcp\Symfony\Polyfill\Php80 as p;
+if (\PHP_VERSION_ID >= 80000) {
+    return;
+}
+if (!\defined('FILTER_VALIDATE_BOOL') && \defined('FILTER_VALIDATE_BOOLEAN')) {
+    \define('FILTER_VALIDATE_BOOL', \FILTER_VALIDATE_BOOLEAN);
+}
+if (!\function_exists('fdiv')) {
+    function fdiv(float $num1, float $num2) : float
+    {
+        return p\Php80::fdiv($num1, $num2);
+    }
+}
+if (!\function_exists('preg_last_error_msg')) {
+    function preg_last_error_msg() : string
+    {
+        return p\Php80::preg_last_error_msg();
+    }
+}
+if (!\function_exists('str_contains')) {
+    function str_contains(?string $haystack, ?string $needle) : bool
+    {
+        return p\Php80::str_contains($haystack ?? '', $needle ?? '');
+    }
+}
+if (!\function_exists('str_starts_with')) {
+    function str_starts_with(?string $haystack, ?string $needle) : bool
+    {
+        return p\Php80::str_starts_with($haystack ?? '', $needle ?? '');
+    }
+}
+if (!\function_exists('str_ends_with')) {
+    function str_ends_with(?string $haystack, ?string $needle) : bool
+    {
+        return p\Php80::str_ends_with($haystack ?? '', $needle ?? '');
+    }
+}
+if (!\function_exists('get_debug_type')) {
+    function get_debug_type($value) : string
+    {
+        return p\Php80::get_debug_type($value);
+    }
+}
+if (!\function_exists('get_resource_id')) {
+    function get_resource_id($resource) : int
+    {
+        return p\Php80::get_resource_id($resource);
+    }
+}