Add Syncplay support

[MakD]

This commit introduces SyncPlay functionality, enabling users to create, join, and manage "Watch Parties" for synchronized playback. It includes a time synchronization engine to handle clock skew, real-time coordination via Jellyfin WebSockets, and a dedicated UI for group management.

Key Changes:

Data Layer:

• Added SyncPlayRepository and JellyfinSyncPlayRepository to handle API interactions for group lifecycle and playback reporting.
• Implemented SyncPlayRawWebSocket for low-level parsing of real-time group events and commands.
• Created SyncPlayTimeSyncEngine to calculate clock offsets between the client and server for precise event scheduling.

UI Components:

• SyncPlayGroupSheet: A new dialog for creating, joining, and viewing active watch party groups and members.
• SyncPlayWaitingOverlay: Added a UI state to indicate when playback is paused waiting for other participants.
• PlayerControls: Added a "Watch Party" toggle button and integrated it with the player UI.

Logic & Integration:

• Introduced SyncPlayViewModel to manage watch party state and coordinate between the repository and the player.
• Updated PlayerViewModel with a SyncPlayInterceptor pattern to allow SyncPlay to intercept and broadcast local playback events (play/pause/seek).
• Integrated lifecycle observers in PlayerScreen to report buffering and readiness states when the app moves between foreground and background.

Infrastructure:

• Updated JellyfinWebSocketManager to subscribe to SyncPlay-specific command and update messages.
• Registered SyncPlayRepository in RepositoryModule for Hilt dependency injection.