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/Iam/V1/IamPolicy.php

@@ -0,0 +1,48 @@
+<?php
+
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/iam/v1/iam_policy.proto
+namespace DeliciousBrains\WP_Offload_Media\Gcp\GPBMetadata\Google\Iam\V1;
+
+class IamPolicy
+{
+    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\Api\Client::initOnce();
+        \DeliciousBrains\WP_Offload_Media\Gcp\GPBMetadata\Google\Api\FieldBehavior::initOnce();
+        \DeliciousBrains\WP_Offload_Media\Gcp\GPBMetadata\Google\Api\Resource::initOnce();
+        \DeliciousBrains\WP_Offload_Media\Gcp\GPBMetadata\Google\Iam\V1\Options::initOnce();
+        \DeliciousBrains\WP_Offload_Media\Gcp\GPBMetadata\Google\Iam\V1\Policy::initOnce();
+        \DeliciousBrains\WP_Offload_Media\Gcp\GPBMetadata\Google\Protobuf\FieldMask::initOnce();
+        $pool->internalAddGeneratedFile('
+ž	
+google/iam/v1/iam_policy.proto
+google.iam.v1google/api/client.protogoogle/api/field_behavior.protogoogle/api/resource.protogoogle/iam/v1/options.protogoogle/iam/v1/policy.proto google/protobuf/field_mask.proto"<22>

+SetIamPolicyRequest
+resource
 
(	B	àAúA
+
**
+policy 
(2.google.iam.v1.PolicyBàA/
+update_mask 
(2.google.protobuf.FieldMask"d
+GetIamPolicyRequest
+resource
 
(	B	àAúA
+
*0
+options 
(2.google.iam.v1.GetPolicyOptions"R
+TestIamPermissionsRequest
+resource
 
(	B	àAúA
+
*
+permissions (	BàA"1
+TestIamPermissionsResponse
+permissions
 (	2´
+	IAMPolicyt
+SetIamPolicy".google.iam.v1.SetIamPolicyRequest.google.iam.v1.Policy")‚Óä“#"/v1/{resource=**}:setIamPolicy:
*t
+GetIamPolicy".google.iam.v1.GetIamPolicyRequest.google.iam.v1.Policy")‚Óä“#"/v1/{resource=**}:getIamPolicy:
*š

+TestIamPermissions(.google.iam.v1.TestIamPermissionsRequest).google.iam.v1.TestIamPermissionsResponse"/‚Óä“)"$/v1/{resource=**}:testIamPermissions:
*ÊAiam-meta-api.googleapis.comB
+com.google.iam.v1BIamPolicyProtoP
Z)cloud.google.com/go/iam/apiv1/iampb;iampbø

ªGoogle.Cloud.Iam.V1ÊGoogle\\Cloud\\Iam\\V1bproto3', \true);
+        static::$is_initialized = \true;
+    }

vendor/Gcp/google/common-protos/metadata/Iam/V1/Logging/AuditData.php

@@ -0,0 +1,25 @@
+<?php
+
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/iam/v1/logging/audit_data.proto
+namespace DeliciousBrains\WP_Offload_Media\Gcp\GPBMetadata\Google\Iam\V1\Logging;
+
+class AuditData
+{
+    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\Iam\V1\Policy::initOnce();
+        $pool->internalAddGeneratedFile('
+<EFBFBD>
+&google/iam/v1/logging/audit_data.protogoogle.iam.v1.logging"=
+	AuditData0
+policy_delta 
(2.google.iam.v1.PolicyDeltaB†

+com.google.iam.v1.loggingBAuditDataProtoP
Z9cloud.google.com/go/iam/apiv1/logging/loggingpb;loggingpbªGoogle.Cloud.Iam.V1.Loggingbproto3', \true);
+        static::$is_initialized = \true;
+    }
+}

vendor/Gcp/google/common-protos/metadata/Iam/V1/Options.php

@@ -0,0 +1,24 @@
+<?php
+
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/iam/v1/options.proto
+namespace DeliciousBrains\WP_Offload_Media\Gcp\GPBMetadata\Google\Iam\V1;
+
+class Options
+{
+    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;
+        }
+        $pool->internalAddGeneratedFile('
+é

+google/iam/v1/options.proto
+google.iam.v1"4
+GetPolicyOptions 
+requested_policy_version
 
(B}
+com.google.iam.v1BOptionsProtoP
Z)cloud.google.com/go/iam/apiv1/iampb;iampbø

ªGoogle.Cloud.Iam.V1ÊGoogle\\Cloud\\Iam\\V1bproto3', \true);
+        static::$is_initialized = \true;
+    }