feat(call): implement CallKeep integration and enhance group call support

Integrate `expo-callkit-telecom` to support native system call handling (answering, ending, and muting via system UI). This includes a new `callKeepService` and a `CallKeepBootstrap` component to manage the lifecycle of system call events.

Additionally, improves the calling experience by:
- Adding support for group calls with participant tracking and UI indicators.
- Enhancing LiveKit integration by replacing polling with event-driven video track synchronization.
- Updating `WebSocketService` to prevent disconnection when the app enters the background during an active call.
- Adding new WebSocket message types for participant join/leave events and group invites.
- Refining call UI components (`CallScreen`, `FloatingCallWindow`, `IncomingCallModal`) for better visual feedback and safe area handling.

Refactor LiveKit service to use event-driven updates for local and remote tracks, improving performance and reliability.

src/data/datasources/CacheDataSource.ts

@@ -152,7 +152,7 @@ export class CacheDataSource implements ICacheDataSource {
       const keys = await AsyncStorage.getAllKeys();
       const cacheKeys = keys.filter(k => k.startsWith(this.persistPrefix));
       if (cacheKeys.length > 0) {
-        await AsyncStorage.multiRemove(cacheKeys);
+        await AsyncStorage.removeMany(cacheKeys);
       }
     } catch (error) {
       throw new DataSourceError(