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/Aws3/Aws/Api/Parser/Exception/ParserException.php

@@ -0,0 +1,49 @@
+<?php
+
+namespace DeliciousBrains\WP_Offload_Media\Aws3\Aws\Api\Parser\Exception;
+
+use DeliciousBrains\WP_Offload_Media\Aws3\Aws\HasMonitoringEventsTrait;
+use DeliciousBrains\WP_Offload_Media\Aws3\Aws\MonitoringEventsInterface;
+use DeliciousBrains\WP_Offload_Media\Aws3\Aws\ResponseContainerInterface;
+use DeliciousBrains\WP_Offload_Media\Aws3\Psr\Http\Message\ResponseInterface;
+class ParserException extends \RuntimeException implements MonitoringEventsInterface, ResponseContainerInterface
+{
+    use HasMonitoringEventsTrait;
+    private $errorCode;
+    private $requestId;
+    private $response;
+    public function __construct($message = '', $code = 0, $previous = null, array $context = [])
+    {
+        $this->errorCode = isset($context['error_code']) ? $context['error_code'] : null;
+        $this->requestId = isset($context['request_id']) ? $context['request_id'] : null;
+        $this->response = isset($context['response']) ? $context['response'] : null;
+        parent::__construct($message, $code, $previous);
+    }
+    /**
+     * Get the error code, if any.
+     *
+     * @return string|null
+     */
+    public function getErrorCode()
+    {
+        return $this->errorCode;
+    }
+    /**
+     * Get the request ID, if any.
+     *
+     * @return string|null
+     */
+    public function getRequestId()
+    {
+        return $this->requestId;
+    }
+    /**
+     * Get the received HTTP response if any.
+     *
+     * @return ResponseInterface|null
+     */
+    public function getResponse()
+    {
+        return $this->response;
+    }
+}