add stream_chat_v1 example

stream_chat_v1/example/test_driver/single_conversation.dart

@@ -0,0 +1,9 @@
+import 'package:flutter_driver/driver_extension.dart';
+
+import '../lib/single_conversation.dart' as app;
+
+void main() async {
+  enableFlutterDriverExtension();
+
+  await app.main();
+}