- Updated the backend to include a new `requested_club_id` field in the registration request model.
- Replaced the club memberships router with a new club join requests router for better management of membership applications.
- Added API endpoints for listing public clubs and managing club join requests, improving user experience during registration and membership processes.
- Enhanced the ClubsPage in the frontend to support member management and join requests, including new modals for adding members and handling requests.
- Updated API utility functions to accommodate new endpoints for club join requests and public club listings.
