feat: 修复了插件需要外部Provider的问题；加上了一个简易的车控状态返回

lib/ai_chat_assistant.dart

@@ -0,0 +1,26 @@
+
+// widgets
+export 'screens/full_screen.dart';
+export 'screens/part_screen.dart';
+export 'app.dart';
+export 'widgets/floating_icon.dart';
+
+// easy bloc
+export 'bloc/easy_bloc.dart';
+export 'bloc/ai_chat_cubit.dart';
+export 'bloc/command_state.dart';
+
+// services
+export 'manager.dart';
+export 'services/message_service.dart';
+export 'services/command_service.dart';
+
+// types && enums && models
+export 'models/vehicle_cmd.dart';
+export 'models/vehicle_cmd_response.dart';
+export 'models/chat_message.dart';
+export 'models/vehicle_status_info.dart';
+
+export 'enums/vehicle_command_type.dart';
+export 'enums/message_status.dart';
+export 'enums/message_service_state.dart';