feat(bloc): add a lot of docs, fix onWrap, and add repo provider

packages/wyatt_bloc_helper/example/lib/counter/cubit/counter_cubit.dart

@@ -1,32 +1,35 @@
 // Copyright (C) 2022 WYATT GROUP
 // Please see the AUTHORS file for details.
-// 
+//
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // any later version.
-// 
+//
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 // GNU General Public License for more details.
-// 
+//
 // You should have received a copy of the GNU General Public License
 // along with this program. If not, see <https://www.gnu.org/licenses/>.
 
+import 'package:bloc_helper_example/counter/repository/counter_repository.dart';
 import 'package:equatable/equatable.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 
 part 'counter_state.dart';
 
 class CounterCubit extends Cubit<CounterState> {
-  CounterCubit() : super(const CounterInitial());
+  final CounterRepository counterRepository;
+
+  CounterCubit(this.counterRepository) : super(const CounterInitial());
 
   void increment() {
-    emit(CounterModified(state.count + 1));
+    emit(CounterModified(counterRepository.increment(state.count)));
   }
 
   void decrement() {
-    emit(CounterModified(state.count - 1));
+    emit(CounterModified(counterRepository.decrement(state.count)));
   }
 }