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/bloc/easy_bloc.dart

@@ -0,0 +1,78 @@
+import 'dart:async';
+
+import 'package:meta/meta.dart';
+
+// 简易的Bloc, 简易的状态管理
+
+abstract class EasyBlocBase<State> {
+
+  EasyBlocBase(this.state): assert(state != null);
+
+  final StreamController<State> _stateController = StreamController<State>.broadcast();
+
+  Stream<State> get stream => _stateController.stream;
+  State state;
+
+  bool _emitted = false;
+
+  // 添加监听器方法
+  StreamSubscription<State> listen(
+      void Function(State state) onData, {
+        Function? onError,
+        void Function()? onDone,
+        bool? cancelOnError,
+      }) {
+    return stream.listen(
+      onData,
+      onError: onError,
+      onDone: onDone,
+      cancelOnError: cancelOnError,
+    );
+  }
+
+  // 新状态
+  void emit(State newState) {
+    if (_stateController.isClosed) return;
+    if (newState == state && _emitted) return;
+    this.state = newState;
+    _stateController.add(state);
+    _emitted = true;
+  }
+
+  @mustCallSuper
+  Future<void> close() async {
+    await _stateController.close();
+  }
+}
+
+class EasyBloc<Event, State> extends EasyBlocBase<State> {
+  EasyBloc(State initialState) : super(initialState) {
+    _eventController.stream.listen(_mapEventToState);
+  }
+
+  final StreamController<Event> _eventController = StreamController<Event>();
+
+  // 子类需要实现这个方法来处理事件
+  @mustBeOverridden
+  void _mapEventToState(Event event) {
+    // 默认不做任何处理，如果不实现会抛出异常
+    throw UnimplementedError('_mapEventToState must be implemented by subclasses');
+  }
+
+  // 添加事件
+  void add(Event event) {
+    if (_eventController.isClosed) return;
+    _eventController.add(event);
+  }
+
+  @override
+  Future<void> close() async {
+    await _eventController.close();
+    await super.close();
+  }
+}
+
+class EasyCubit<State> extends EasyBlocBase<State> {
+  EasyCubit(State initialState) : super(initialState);
+}
+