Refactor registration and dashboard features to support invite codes and Bunny uploads

- Moved registration logic to a new client component for better separation of concerns.
- Integrated invite code requirement based on feature flags in the registration process.
- Enhanced dashboard functionality to conditionally enable Bunny uploads based on feature flags.
- Updated various components and API routes to check for Bunny uploads and Stripe billing feature flags.
- Added new feature flag utilities for managing feature toggles in the application.

components/video-page/hooks/use-version-actions.ts

@@ -16,6 +16,7 @@ interface UseVersionActionsParams extends VersionActionsConfig {
 export function useVersionActions({
   projectId,
   videoId,
+  bunnyUploadsEnabled = true,
   setVideo,
   activeVersionId,
   setActiveVersionId,
@@ -76,6 +77,7 @@ export function useVersionActions({
         finalThumbnailUrl = getThumbnailUrl(newVersionSource, 'large');
         finalDuration = meta?.duration || null;
       } else {
+        if (!bunnyUploadsEnabled) throw new Error('Direct uploads are disabled by this host');
         if (!newVersionFile) throw new Error('No file selected');
         let title = newVersionFile.name;
         if (newVersionLabel.trim()) {