Add bloc_dispose_scope example

packages/bloc_dispose_scope/example/main.dart

@@ -0,0 +1,30 @@
+import 'package:bloc/bloc.dart';
+import 'package:bloc_dispose_scope/bloc_dispose_scope.dart';
+import 'package:dispose_scope/dispose_scope.dart';
+
+class DependencyCubit extends Cubit<String> {
+  DependencyCubit() : super('');
+}
+
+class MainCubit extends Cubit<String> with BlocBaseDisposeScopeMixin {
+  MainCubit(this._dependencyCubit) : super('') {
+    // StreamSubscription will be cancelled when MainCubit is closed
+    _dependencyCubit.stream
+        .listen(_onDependencyCubitStateChanged)
+        .disposed(scope);
+  }
+
+  final DependencyCubit _dependencyCubit;
+
+  void _onDependencyCubitStateChanged(String dependencyState) {}
+}
+
+void main() {
+  final disposeScope = DisposeScope();
+
+  // Both cubits will be disposed when disposeScope is disposed
+  final _dependencyCubit = DependencyCubit()..disposed(disposeScope);
+  MainCubit(_dependencyCubit).disposed(disposeScope);
+
+  disposeScope.dispose();
+}