Fix a type casting error in text_input.dart by @LongCatIsLooong in https://github.com/flutter/flutter/pull/109635

Re-land Add Spell Check to EditableText  by @camsim99 in https://github.com/flutter/flutter/pull/109643

[docs][FWW] DropdownButton, ScaffoldMessenger, and StatefulBuilder links by @craiglabenz in https://github.com/flutter/flutter/pull/100316

Fix AppBar centerTitle position with actions. by @bernaferrari in https://github.com/flutter/flutter/pull/106256

Improve ShapeDecoration performance. by @bernaferrari in https://github.com/flutter/flutter/pull/108648