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/google/common-protos/metadata/Cloud/Location/Locations.php

@@ -0,0 +1,48 @@
+<?php
+
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/cloud/location/locations.proto
+namespace DeliciousBrains\WP_Offload_Media\Gcp\GPBMetadata\Google\Cloud\Location;
+
+class Locations
+{
+    public static $is_initialized = \false;
+    public static function initOnce()
+    {
+        $pool = \DeliciousBrains\WP_Offload_Media\Gcp\Google\Protobuf\Internal\DescriptorPool::getGeneratedPool();
+        if (static::$is_initialized == \true) {
+            return;
+        }
+        \DeliciousBrains\WP_Offload_Media\Gcp\GPBMetadata\Google\Api\Annotations::initOnce();
+        \DeliciousBrains\WP_Offload_Media\Gcp\GPBMetadata\Google\Protobuf\Any::initOnce();
+        \DeliciousBrains\WP_Offload_Media\Gcp\GPBMetadata\Google\Api\Client::initOnce();
+        $pool->internalAddGeneratedFile('
+Ó
+%google/cloud/location/locations.protogoogle.cloud.locationgoogle/protobuf/any.protogoogle/api/client.proto"[
+ListLocationsRequest
+name
 
(	
+filter 
(	
+	page_size 
(
+
+page_token 
(	"d
+ListLocationsResponse2
+	locations
 (2.google.cloud.location.Location
+next_page_token 
(	""
+GetLocationRequest
+name
 
(	"×

+Location
+name
 
(	
+location_id 
(	
+display_name 
(	;
+labels (2+.google.cloud.location.Location.LabelsEntry&
+metadata 
(2.google.protobuf.Any-
+LabelsEntry
+key
 
(	
+value 
(	:8
2¤
+	Locations«

+
+ListLocations+.google.cloud.location.ListLocationsRequest,.google.cloud.location.ListLocationsResponse"?‚Óä“9/v1/{name=locations}Z!/v1/{name=projects/*}/locationsž

+GetLocation).google.cloud.location.GetLocationRequest.google.cloud.location.Location"C‚Óä“=/v1/{name=locations/*}Z#!/v1/{name=projects/*/locations/*}HÊAcloud.googleapis.comÒA.https://www.googleapis.com/auth/cloud-platformBo
+com.google.cloud.locationBLocationsProtoP
Z=google.golang.org/genproto/googleapis/cloud/location;locationø

bproto3', \true);
+        static::$is_initialized = \true;
+    }