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/ramsey/uuid/src/Provider/Node/StaticNodeProvider.php

@@ -0,0 +1,58 @@
+<?php
+
+/**
+ * This file is part of the ramsey/uuid library
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ *
+ * @copyright Copyright (c) Ben Ramsey <ben@benramsey.com>
+ * @license http://opensource.org/licenses/MIT MIT
+ */
+declare (strict_types=1);
+namespace DeliciousBrains\WP_Offload_Media\Gcp\Ramsey\Uuid\Provider\Node;
+
+use DeliciousBrains\WP_Offload_Media\Gcp\Ramsey\Uuid\Exception\InvalidArgumentException;
+use DeliciousBrains\WP_Offload_Media\Gcp\Ramsey\Uuid\Provider\NodeProviderInterface;
+use DeliciousBrains\WP_Offload_Media\Gcp\Ramsey\Uuid\Type\Hexadecimal;
+use function dechex;
+use function hexdec;
+use function str_pad;
+use function substr;
+use const STR_PAD_LEFT;
+/**
+ * StaticNodeProvider provides a static node value with the multicast bit set
+ *
+ * @link http://tools.ietf.org/html/rfc4122#section-4.5 RFC 4122, § 4.5: Node IDs that Do Not Identify the Host
+ */
+class StaticNodeProvider implements NodeProviderInterface
+{
+    /**
+     * @var Hexadecimal
+     */
+    private $node;
+    /**
+     * @param Hexadecimal $node The static node value to use
+     */
+    public function __construct(Hexadecimal $node)
+    {
+        if (\strlen($node->toString()) > 12) {
+            throw new InvalidArgumentException('Static node value cannot be greater than 12 hexadecimal characters');
+        }
+        $this->node = $this->setMulticastBit($node);
+    }
+    public function getNode() : Hexadecimal
+    {
+        return $this->node;
+    }
+    /**
+     * Set the multicast bit for the static node value
+     */
+    private function setMulticastBit(Hexadecimal $node) : Hexadecimal
+    {
+        $nodeHex = str_pad($node->toString(), 12, '0', STR_PAD_LEFT);
+        $firstOctet = substr($nodeHex, 0, 2);
+        $firstOctet = str_pad(dechex(hexdec($firstOctet) | 0x1), 2, '0', STR_PAD_LEFT);
+        return new Hexadecimal($firstOctet . substr($nodeHex, 2));
+    }
+}