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/Operation.php

@@ -0,0 +1,124 @@
+<?php
+
+namespace DeliciousBrains\WP_Offload_Media\Aws3\Aws\Api;
+
+/**
+ * Represents an API operation.
+ */
+class Operation extends AbstractModel
+{
+    private $input;
+    private $output;
+    private $errors;
+    private $staticContextParams = [];
+    private $contextParams;
+    public function __construct(array $definition, ShapeMap $shapeMap)
+    {
+        $definition['type'] = 'structure';
+        if (!isset($definition['http']['method'])) {
+            $definition['http']['method'] = 'POST';
+        }
+        if (!isset($definition['http']['requestUri'])) {
+            $definition['http']['requestUri'] = '/';
+        }
+        if (isset($definition['staticContextParams'])) {
+            $this->staticContextParams = $definition['staticContextParams'];
+        }
+        parent::__construct($definition, $shapeMap);
+        $this->contextParams = $this->setContextParams();
+    }
+    /**
+     * Returns an associative array of the HTTP attribute of the operation:
+     *
+     * - method: HTTP method of the operation
+     * - requestUri: URI of the request (can include URI template placeholders)
+     *
+     * @return array
+     */
+    public function getHttp()
+    {
+        return $this->definition['http'];
+    }
+    /**
+     * Get the input shape of the operation.
+     *
+     * @return StructureShape
+     */
+    public function getInput()
+    {
+        if (!$this->input) {
+            if ($input = $this['input']) {
+                $this->input = $this->shapeFor($input);
+            } else {
+                $this->input = new StructureShape([], $this->shapeMap);
+            }
+        }
+        return $this->input;
+    }
+    /**
+     * Get the output shape of the operation.
+     *
+     * @return StructureShape
+     */
+    public function getOutput()
+    {
+        if (!$this->output) {
+            if ($output = $this['output']) {
+                $this->output = $this->shapeFor($output);
+            } else {
+                $this->output = new StructureShape([], $this->shapeMap);
+            }
+        }
+        return $this->output;
+    }
+    /**
+     * Get an array of operation error shapes.
+     *
+     * @return Shape[]
+     */
+    public function getErrors()
+    {
+        if ($this->errors === null) {
+            if ($errors = $this['errors']) {
+                foreach ($errors as $key => $error) {
+                    $errors[$key] = $this->shapeFor($error);
+                }
+                $this->errors = $errors;
+            } else {
+                $this->errors = [];
+            }
+        }
+        return $this->errors;
+    }
+    /**
+     * Gets static modeled static values used for
+     * endpoint resolution.
+     *
+     * @return array
+     */
+    public function getStaticContextParams()
+    {
+        return $this->staticContextParams;
+    }
+    /**
+     * Gets definition of modeled dynamic values used
+     * for endpoint resolution
+     *
+     * @return array
+     */
+    public function getContextParams()
+    {
+        return $this->contextParams;
+    }
+    private function setContextParams()
+    {
+        $members = $this->getInput()->getMembers();
+        $contextParams = [];
+        foreach ($members as $name => $shape) {
+            if (!empty($contextParam = $shape->getContextParam())) {
+                $contextParams[$contextParam['name']] = ['shape' => $name, 'type' => $shape->getType()];
+            }
+        }
+        return $contextParams;
+    }
+}