feat(CallFeature): implement call functionality and integrate WebSocket signaling

- Updated app.json to include microphone permissions and background audio support.
- Added call-related dependencies in package.json and package-lock.json.
- Enhanced ChatScreen to initiate calls and handle call actions.
- Introduced call components in the layout for incoming call handling.
- Expanded WebSocket service to manage call signaling messages and events.
- Refactored authStore to initialize call state on user authentication.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "carrot_bbs",
-  "version": "1.0.1",
+  "version": "1.0.2",
   "main": "expo-router/entry",
   "scripts": {
     "start": "expo start",
@@ -60,6 +60,7 @@
     "react-native-screens": "~4.23.0",
     "react-native-sse": "^1.2.1",
     "react-native-web": "^0.21.0",
+    "react-native-webrtc": "^124.0.7",
     "react-native-webview": "13.16.0",
     "react-native-worklets": "0.7.2",
     "zod": "^4.3.6",