feat: mobile tool bar basic features (#161)

* refactor: refactor mobile toolbar

* feat: add text decoration icon in AFMobileIcons

* chore: update mobile parameter

* feat: add text decoration basic feature

* chore: replace text by AppFlowyEditorLocalizations

* feat: add code toolbar item

* chore: refactor code
- add hasMenu in MToolbarItem
- add const size

* feat: add line input menu

* chore: create toolbar items draft file

* refactor: textDecorationMToolbarItem refactor

* fix: add key to ensures MToolbarWidget is rebuilt whenever the selection changes

* feat: add link toolbar item and the way to close item menu

* chore: replace m by mobile

* chore:replace BuiltInAttributeKey by FlowyRichTextKeys

* chore: replace m by mobile

* refactor: refactor MobileToolbarWidget

* refactor: add MobileToolbarStyle to control all cosmetic parameters

* refactor: refactor MobileToolbarItemMenuBtn to stateless widget

* feat: add heading menu

* fix: fix open the wrong menu

* feat: add heading icon

* feat: add todo list and list toolbar item

* feat: add quote toolbar item

* fix: fix selection service error

* test: add mobile toolbar basic elements test

* test: add item menu button test and helper widgets

* test: add text decoration mobile toolbar item test

* test: add code mobile toolbar item test

* test: add heading mobile toolbar item test

* test: add list mobile toolbar item test

* chore: fix typo

* test: add quote mobile toolbar item test

* test: add todo list mobile toolbar item test

* test: add link mobile toolbar item test

* chore: update name and add Material widget

* fix: flutter analyze

* fix: flutter analyze in test mobile toolbar

* chore: dart format test code

* refactor: improve code

* fix: fix refactor error

* chore: move all the tests in mobile to test/mobile

* chore: move toolbar/items to toolbar/desktop/items

* chore: remove the mobileToolbarItemMenuStateKey

* chore: add some comments

* test: update testing

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Co-authored-by: Lucas.Xu <lucas.xu@appflowy.io>

lib/appflowy_editor.dart

@@ -66,3 +66,4 @@ export 'src/core/document/deprecated/document.dart';
 export 'src/plugins/html/html_document_decoder.dart';
 export 'src/plugins/html/html_document_encoder.dart';
 export 'src/plugins/html/html_document.dart';
+export 'src/infra/mobile/mobile.dart';