refactor: move built_in_attributes_key to core/legacy

frontend/app_flowy/packages/appflowy_editor/lib/appflowy_editor.dart

@@ -10,7 +10,7 @@ export 'src/core/location/selection.dart';
 export 'src/core/state/document.dart';
 export 'src/core/document/text_delta.dart';
 export 'src/core/document/attributes.dart';
-export 'src/document/built_in_attribute_keys.dart';
+export 'src/core/legacy/built_in_attribute_keys.dart';
 export 'src/editor_state.dart';
 export 'src/operation/operation.dart';
 export 'src/operation/transaction.dart';

frontend/app_flowy/packages/appflowy_editor/lib/src/commands/format_built_in_text.dart

@@ -1,7 +1,7 @@
 import 'package:appflowy_editor/src/commands/format_text.dart';
 import 'package:appflowy_editor/src/commands/text_command_infra.dart';
 import 'package:appflowy_editor/src/core/document/attributes.dart';
-import 'package:appflowy_editor/src/document/built_in_attribute_keys.dart';
+import 'package:appflowy_editor/src/core/legacy/built_in_attribute_keys.dart';
 import 'package:appflowy_editor/src/core/document/node.dart';
 import 'package:appflowy_editor/src/core/document/path.dart';
 import 'package:appflowy_editor/src/core/location/selection.dart';

frontend/app_flowy/packages/appflowy_editor/lib/src/core/document/node.dart

@@ -4,7 +4,7 @@ import 'package:flutter/material.dart';
 
 import 'package:appflowy_editor/src/core/document/attributes.dart';
 import 'package:appflowy_editor/src/core/document/path.dart';
-import 'package:appflowy_editor/src/document/built_in_attribute_keys.dart';
+import 'package:appflowy_editor/src/core/legacy/built_in_attribute_keys.dart';
 import 'package:appflowy_editor/src/core/document/text_delta.dart';
 
 class Node extends ChangeNotifier with LinkedListEntry<Node> {

frontend/app_flowy/packages/appflowy_editor/lib/src/core/state/document.dart

@@ -1,9 +1,9 @@
 import 'dart:collection';
 
+import 'package:appflowy_editor/src/core/document/attributes.dart';
 import 'package:appflowy_editor/src/core/document/node.dart';
 import 'package:appflowy_editor/src/core/document/path.dart';
 import 'package:appflowy_editor/src/core/document/text_delta.dart';
-import '../document/attributes.dart';
 
 /// [Document] reprensents a AppFlowy Editor document structure.
 ///

frontend/app_flowy/packages/appflowy_editor/lib/src/extensions/attributes_extension.dart

@@ -1,5 +1,5 @@
 import 'package:appflowy_editor/src/core/document/attributes.dart';
-import 'package:appflowy_editor/src/document/built_in_attribute_keys.dart';
+import 'package:appflowy_editor/src/core/legacy/built_in_attribute_keys.dart';
 import 'package:flutter/material.dart';
 
 extension NodeAttributesExtensions on Attributes {

frontend/app_flowy/packages/appflowy_editor/lib/src/extensions/text_node_extensions.dart

@@ -3,7 +3,7 @@ import 'package:appflowy_editor/src/core/document/path.dart';
 import 'package:appflowy_editor/src/core/location/position.dart';
 import 'package:appflowy_editor/src/core/location/selection.dart';
 import 'package:appflowy_editor/src/core/document/text_delta.dart';
-import 'package:appflowy_editor/src/document/built_in_attribute_keys.dart';
+import 'package:appflowy_editor/src/core/legacy/built_in_attribute_keys.dart';
 
 extension TextNodeExtension on TextNode {
   T? getAttributeInSelection<T>(Selection selection, String styleKey) {

frontend/app_flowy/packages/appflowy_editor/lib/src/infra/html_converter.dart

@@ -8,7 +8,7 @@ import 'package:appflowy_editor/src/extensions/color_extension.dart';
 import 'package:flutter/material.dart';
 import 'package:html/parser.dart' show parse;
 import 'package:html/dom.dart' as html;
-import 'package:appflowy_editor/src/document/built_in_attribute_keys.dart';
+import 'package:appflowy_editor/src/core/legacy/built_in_attribute_keys.dart';
 
 class HTMLTag {
   static const h1 = "h1";

frontend/app_flowy/packages/appflowy_editor/lib/src/render/selection_menu/selection_menu_service.dart

@@ -6,7 +6,7 @@ import 'package:appflowy_editor/src/render/selection_menu/selection_menu_widget.
 import 'package:appflowy_editor/src/service/default_text_operations/format_rich_text_style.dart';
 
 import 'package:flutter/material.dart';
-import 'package:appflowy_editor/src/document/built_in_attribute_keys.dart';
+import 'package:appflowy_editor/src/core/legacy/built_in_attribute_keys.dart';
 
 abstract class SelectionMenuService {
   Offset get topLeft;

frontend/app_flowy/packages/appflowy_editor/lib/src/service/default_text_operations/format_rich_text_style.dart

@@ -6,7 +6,7 @@ import 'package:appflowy_editor/src/core/location/selection.dart';
 import 'package:appflowy_editor/src/editor_state.dart';
 import 'package:appflowy_editor/src/extensions/text_node_extensions.dart';
 import 'package:appflowy_editor/src/operation/transaction_builder.dart';
-import 'package:appflowy_editor/src/document/built_in_attribute_keys.dart';
+import 'package:appflowy_editor/src/core/legacy/built_in_attribute_keys.dart';
 
 void insertHeadingAfterSelection(EditorState editorState, String heading) {
   insertTextNodeAfterSelection(editorState, {

frontend/app_flowy/packages/appflowy_editor/lib/src/service/internal_key_event_handlers/number_list_helper.dart

@@ -1,6 +1,6 @@
 import 'package:appflowy_editor/src/core/location/selection.dart';
 import 'package:appflowy_editor/src/editor_state.dart';
-import 'package:appflowy_editor/src/document/built_in_attribute_keys.dart';
+import 'package:appflowy_editor/src/core/legacy/built_in_attribute_keys.dart';
 import 'package:appflowy_editor/src/operation/transaction_builder.dart';
 import 'package:appflowy_editor/src/core/document/attributes.dart';
 

frontend/app_flowy/packages/appflowy_editor/lib/src/service/internal_key_event_handlers/whitespace_handler.dart

@@ -1,7 +1,7 @@
 import 'package:appflowy_editor/src/service/shortcut_event/shortcut_event_handler.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
-import 'package:appflowy_editor/src/document/built_in_attribute_keys.dart';
+import 'package:appflowy_editor/src/core/legacy/built_in_attribute_keys.dart';
 import 'package:appflowy_editor/src/core/document/node.dart';
 import 'package:appflowy_editor/src/core/location/position.dart';
 import 'package:appflowy_editor/src/core/location/selection.dart';