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/Rpc/Context/AttributeContext.php

@@ -0,0 +1,104 @@
+<?php
+
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/rpc/context/attribute_context.proto
+namespace DeliciousBrains\WP_Offload_Media\Gcp\GPBMetadata\Google\Rpc\Context;
+
+class AttributeContext
+{
+    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\Protobuf\Any::initOnce();
+        \DeliciousBrains\WP_Offload_Media\Gcp\GPBMetadata\Google\Protobuf\Duration::initOnce();
+        \DeliciousBrains\WP_Offload_Media\Gcp\GPBMetadata\Google\Protobuf\Struct::initOnce();
+        \DeliciousBrains\WP_Offload_Media\Gcp\GPBMetadata\Google\Protobuf\Timestamp::initOnce();
+        $pool->internalAddGeneratedFile('
+»
+*google/rpc/context/attribute_context.protogoogle.rpc.contextgoogle/protobuf/duration.protogoogle/protobuf/struct.protogoogle/protobuf/timestamp.proto"ƒ
+AttributeContext9
+origin 
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+Peer
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+claims 
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+access_levels (	ï
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+host 
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+scheme 
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+size
+ 
(
+protocol 
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+reason 
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+auth
+ 
(2).google.rpc.context.AttributeContext.Auth.
+HeadersEntry
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+Response
+code
 
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+display_name 
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+ 
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+com.google.rpc.contextBAttributeContextProtoP
ZUgoogle.golang.org/genproto/googleapis/rpc/context/attribute_context;attribute_contextø

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

vendor/Gcp/google/common-protos/metadata/Rpc/Context/AuditContext.php

@@ -0,0 +1,29 @@
+<?php
+
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/rpc/context/audit_context.proto
+namespace DeliciousBrains\WP_Offload_Media\Gcp\GPBMetadata\Google\Rpc\Context;
+
+class AuditContext
+{
+    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\Protobuf\Struct::initOnce();
+        $pool->internalAddGeneratedFile('
+û
+&google/rpc/context/audit_context.protogoogle.rpc.context"Ç

+AuditContext
+	audit_log
 
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+scrubbed_request 
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+target_resource 
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+com.google.rpc.contextBAuditContextProtoP
Z9google.golang.org/genproto/googleapis/rpc/context;contextø

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

vendor/Gcp/google/common-protos/metadata/Rpc/ErrorDetails.php

@@ -0,0 +1,72 @@
+<?php
+
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/rpc/error_details.proto
+namespace DeliciousBrains\WP_Offload_Media\Gcp\GPBMetadata\Google\Rpc;
+
+class ErrorDetails
+{
+    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\Protobuf\Duration::initOnce();
+        $pool->internalAddGeneratedFile('
+ê
+google/rpc/error_details.proto
+google.rpc"“

+	ErrorInfo
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(	
+domain 
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+metadata (2#.google.rpc.ErrorInfo.MetadataEntry/
+
+MetadataEntry
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(	:8
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+	RetryInfo.
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(2.google.protobuf.Duration"2
+	DebugInfo
+
+stack_entries
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+detail 
(	"y
+QuotaFailure6
+
+violations
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+
+violations
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+	Violation
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(	
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(	
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(	"ƒ

+
+BadRequest?
+field_violations
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+FieldViolation
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(	
+description 
(	"7
+RequestInfo
+
+request_id
 
(	
+serving_data 
(	"`
+ResourceInfo
+
+resource_type
 
(	
+
+resource_name 
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+owner 
(	
+description 
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+Help$
+links
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(	
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+locale
 
(	
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vendor/Gcp/google/common-protos/metadata/Rpc/Status.php

@@ -0,0 +1,28 @@
+<?php
+
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/rpc/status.proto
+namespace DeliciousBrains\WP_Offload_Media\Gcp\GPBMetadata\Google\Rpc;
+
+class Status
+{
+    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\Protobuf\Any::initOnce();
+        $pool->internalAddGeneratedFile('
+ŕ

+google/rpc/status.proto
+google.rpc"N
+Status
+code
 
(
+message 
(	%
+details (2.google.protobuf.AnyBa
+com.google.rpcBStatusProtoP
Z7google.golang.org/genproto/googleapis/rpc/status;statusř

˘RPCbproto3', \true);
+        static::$is_initialized = \true;
+    }
+}