feat: [Improvement] Refactor selection menu #879

Author: LucasXu0

frontend/app_flowy/packages/appflowy_editor/assets/document.json

@@ -1,5 +1,6 @@
 import 'dart:async';
 import 'package:appflowy_editor/src/infra/log.dart';
+import 'package:appflowy_editor/src/render/selection_menu/selection_menu_widget.dart';
 import 'package:appflowy_editor/src/service/service.dart';
 import 'package:flutter/material.dart';
 
@@ -54,6 +55,9 @@ class EditorState {
   /// with this variable.
   LogConfiguration get logConfiguration => LogConfiguration();
 
+  /// Stores the selection menu items.
+  List<SelectionMenuItem> selectionMenuItems = [];
+
   final UndoManager undoManager = UndoManager();
   Selection? _cursorSelection;
 

frontend/app_flowy/packages/appflowy_editor/assets/images/popup_list/bullets.svg renamed to frontend/app_flowy/packages/appflowy_editor/assets/images/selection_menu/bulleted_list.svg

@@ -23,7 +23,7 @@ class TransactionBuilder {
   TransactionBuilder(this.state);
 
   /// Commits the operations to the state
-  commit() {
+  Future<void> commit() async {
     final transaction = finish();
     state.apply(transaction);
   }