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/data/cloudfront/2018-06-18/waiters-1.json.php

@@ -0,0 +1,6 @@
+<?php
+
+namespace DeliciousBrains\WP_Offload_Media\Aws3;
+
+// This file was auto-generated from sdk-root/src/data/cloudfront/2018-06-18/waiters-1.json
+return ['waiters' => ['__default__' => ['success_type' => 'output', 'success_path' => 'Status'], 'StreamingDistributionDeployed' => ['operation' => 'GetStreamingDistribution', 'description' => 'Wait until a streaming distribution is deployed.', 'interval' => 60, 'max_attempts' => 25, 'success_value' => 'Deployed'], 'DistributionDeployed' => ['operation' => 'GetDistribution', 'description' => 'Wait until a distribution is deployed.', 'interval' => 60, 'max_attempts' => 25, 'success_value' => 'Deployed'], 'InvalidationCompleted' => ['operation' => 'GetInvalidation', 'description' => 'Wait until an invalidation has completed.', 'interval' => 20, 'max_attempts' => 30, 'success_value' => 'Completed']]];