Update PopupMenuButton example by @TahaTesser in https://github.com/flutter/flutter/pull/96681

[Icons] Prevent double underscores after replacement by @guidezpl in https://github.com/flutter/flutter/pull/96904

improve docs for testing dart fix by @werainkhatri in https://github.com/flutter/flutter/pull/97493

PointerDeviceKind and ui.PointerChange forwards-compatibility by @moffatman in https://github.com/flutter/flutter/pull/97350

Re-land “Support Scribble Handwriting” (#96615) by @fbcouch in https://github.com/flutter/flutter/pull/97437

BottomNavigationBar: add themeable mouse cursor by @TahaTesser in https://github.com/flutter/flutter/pull/96736