-`AppFlowyEditor.custom` and `AppFlowyEditor.standard` have been removed. Use `AppFlowyEditor.` instead.
- For now, we provide the default values to the `blockComponentBuilders`, `characterShortcutEvents`, and `commandShortcutEvents` if you do not customize them.
-`DefaultSelectable` has been renamed to `DefaultSelectableMixin`
-`FlowyRichText` has been renamed to `AppFlowyRichText`.
- Added new parameter called `context`(BuildContext) into `TextSpanDecoratorForAttribute`.