feat: enable S3 video uploads and update related configurations

- Added support for self-hosted S3 video uploads with new environment variables: OPENFRAME_ENABLE_S3_VIDEO_UPLOADS and OPENFRAME_MAX_VIDEO_UPLOAD_BYTES.
- Updated .env.example and .env.docker.example to reflect new configuration options.
- Enhanced Content Security Policy to include origins for S3-compatible storage.
- Updated dependencies for AWS SDK to support new features.
- Refactored upload logic to accommodate both Bunny and S3 upload providers.
- Updated documentation to clarify the usage of direct uploads and S3 configurations.
- Closes #11

app/(dashboard)/projects/[projectId]/videos/[videoId]/page.tsx

@@ -1,6 +1,6 @@
 import { VideoPageContent } from '@/components/video-page-content';
 import { auth } from '@/lib/auth';
-import { isBunnyUploadsEnabled } from '@/lib/feature-flags';
+import { isDirectFileUploadEnabled, isS3VideoUploadsEnabled } from '@/lib/feature-flags';
 import { requireVideoProjectAccessOrRedirect } from '@/lib/route-access';
 
 interface VideoPageProps {
@@ -24,7 +24,8 @@ export default async function VideoPage({ params }: VideoPageProps) {
       mode="dashboard"
       videoId={videoId}
       projectId={projectId}
-      bunnyUploadsEnabled={isBunnyUploadsEnabled()}
+      directUploadsEnabled={isDirectFileUploadEnabled()}
+      directUploadProvider={isS3VideoUploadsEnabled() ? 'r2' : 'bunny'}
     />
   );
 }