Add docs about horizontal scrollbars by @Piinks in https://github.com/flutter/flutter/pull/97673

Update SliverChildDelegate docs by @Piinks in https://github.com/flutter/flutter/pull/97674

Add splashBorderRadius to TabBar by @nayeemtby in https://github.com/flutter/flutter/pull/97204

Invalidate the TextPainter line metrics cache when redoing text layout by @jason-simmons in https://github.com/flutter/flutter/pull/97446

Fix RouterObserver didPop is not called when reverseTransitionDuratio… by @chunhtai in https://github.com/flutter/flutter/pull/97171

Fix Local SwitchTheme not being inherited by Switch Widget by @TahaTesser in https://github.com/flutter/flutter/pull/97705