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/Result.php

@@ -0,0 +1,51 @@
+<?php
+
+namespace DeliciousBrains\WP_Offload_Media\Aws3\Aws;
+
+use DeliciousBrains\WP_Offload_Media\Aws3\JmesPath\Env as JmesPath;
+/**
+ * AWS result.
+ */
+class Result implements ResultInterface, MonitoringEventsInterface
+{
+    use HasDataTrait;
+    use HasMonitoringEventsTrait;
+    public function __construct(array $data = [])
+    {
+        $this->data = $data;
+    }
+    public function hasKey($name)
+    {
+        return isset($this->data[$name]);
+    }
+    public function get($key)
+    {
+        return $this[$key];
+    }
+    public function search($expression)
+    {
+        return JmesPath::search($expression, $this->toArray());
+    }
+    public function __toString()
+    {
+        $jsonData = \json_encode($this->toArray(), \JSON_PRETTY_PRINT);
+        return <<<EOT
+Model Data
+----------
+Data can be retrieved from the model object using the get() method of the
+model (e.g., `\$result->get(\$key)`) or "accessing the result like an
+associative array (e.g. `\$result['key']`). You can also execute JMESPath
+expressions on the result data using the search() method.
+
+{$jsonData}
+
+EOT;
+    }
+    /**
+     * @deprecated
+     */
+    public function getPath($path)
+    {
+        return $this->search(\str_replace('/', '.', $path));
+    }
+}