Refactor plugin management system

- Updated PluginLoader to utilize the new plugin marketplace manager for loading and managing plugins.
- Simplified the plugin loading process by removing unnecessary state management and directly integrating with the plugin marketplace.
- Enhanced error handling during plugin installation and uninstallation processes.
- Removed legacy code related to Electron-specific plugin handling, streamlining the codebase for web compatibility.
- Updated Plugins component to fetch marketplace plugins and installed plugins using the new plugin marketplace manager.
- Refactored types related to plugins to import from the new plugin manager module, ensuring consistency and reducing redundancy.
- Removed unused calling configuration from client settings and adjusted related types accordingly.
- Cleaned up room state events by removing references to LiveKit service URLs, aligning with the updated architecture.

src/app/features/call/CallService.ts

@@ -300,26 +300,10 @@ export class CallService {
         this.config.accessToken
       );
 
-      // Step 2: Determine LiveKit service URL (check room-level config first)
-      let livekitServiceUrl = this.config.livekitServiceUrl;
-      
-      // Check if room has a custom LiveKit config
-      const room = this.matrixClient.getRoom(roomId);
-      if (room) {
-        const livekitConfigEvent = room.currentState.getStateEvents('im.paarrot.room.livekit_config', '');
-        if (livekitConfigEvent) {
-          const roomLivekitUrl = livekitConfigEvent.getContent()?.service_url;
-          if (roomLivekitUrl) {
-            console.log('Using room-level LiveKit URL:', roomLivekitUrl);
-            livekitServiceUrl = roomLivekitUrl;
-          }
-        }
-      }
-
-      // Step 3: Exchange OpenID token for LiveKit JWT
+      // Step 2: Exchange OpenID token for LiveKit JWT
       console.log('Requesting LiveKit JWT for Matrix room:', roomId);
       this.livekitJwt = await fetchLiveKitJWT(
-        livekitServiceUrl,
+        this.config.livekitServiceUrl,
         roomId,
         this.config.userId,
         this.config.deviceId,