Flutter 3.44.0 release notes

Flutter 3.44.0 release notes covering hundreds of changes across the framework, Material, and Cupertino layers. Key highlights include: numerous crash fixes for widgets in 0x0 environments, new CupertinoSheetRoute with scrolling and dragging support, CupertinoMenuAnchor and CupertinoMenuItem implementation, tooltip window support on Windows/macOS/Linux, Android display corner radii support, infinite carousel support, RoundedSuperellipseInputBorder, Hero widget customizable animation curves, Dart 3.10 bump, improved accessibility evaluations, web fixes for IME/autofill/scroll, and extensive test refactoring to remove unnecessary Material dependencies.