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/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;
+    }
+}