➕ Add flutter webrtc

⬇️ Downgrade analyzer & custom lint for fix flutter new version related bugs

lib/screens/chat/call.dart

@@ -0,0 +1,40 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_hooks/flutter_hooks.dart';
+import 'package:hooks_riverpod/hooks_riverpod.dart';
+import 'package:island/pods/call.dart';
+
+class CallScreen extends HookConsumerWidget {
+  const CallScreen({super.key});
+
+  @override
+  Widget build(BuildContext context, WidgetRef ref) {
+    final callState = ref.watch(callNotifierProvider);
+    final callNotifier = ref.read(callNotifierProvider.notifier);
+
+    useEffect(() {
+      callNotifier.initialize();
+      return null;
+    }, []);
+
+    return Scaffold(
+      appBar: AppBar(title: const Text('Audio Call')),
+      body: Center(
+        child: Column(
+          mainAxisAlignment: MainAxisAlignment.center,
+          children: [
+            if (callState.error != null)
+              Text(callState.error!, style: const TextStyle(color: Colors.red)),
+            IconButton(
+              icon: Icon(callState.isMuted ? Icons.mic_off : Icons.mic),
+              onPressed: callNotifier.toggleMute,
+            ),
+            if (callState.isConnected)
+              const Text('Connected')
+            else
+              const CircularProgressIndicator(),
+          ],
+        ),
+      ),
+    );
+  }
+}