Remove deprecated Scaffold SnackBar API by @Piinks in https://github.com/flutter/flutter/pull/98549

Migrate common buttons to Material 3 by @darrenaustin in https://github.com/flutter/flutter/pull/100794

Allow ClipRRect.borderRadius to support BorderRadiusDirectional by @MrBirb in https://github.com/flutter/flutter/pull/101200

Add some debug properties to BackdropFilterLayer by @wangying3426 in https://github.com/flutter/flutter/pull/101101

Add debugging flags to enhance the timeline arguments for Build, Layout, and Paint by @kenzieschmoll in https://github.com/flutter/flutter/pull/101602

Remove deprecated FlatButton by @Piinks in https://github.com/flutter/flutter/pull/98545