28064 [UWP] Implement clipboard. (cla: yes, waiting for tree to go green, platform-windows, needs tests)

28098 [UWP] Implement setting cursor icon. (cla: yes, waiting for tree to go green, platform-windows, needs tests)

28100 [UWP] Add all mouse buttons support (cla: yes, waiting for tree to go green, platform-windows, needs tests)

28125 Fix dead key handling on Win32 (again) (cla: yes, platform-windows)

28131 Windows: Add dark theme support. (cla: yes, platform-windows)

28298 Windows: FlutterDesktopPixelBuffer: Add optional release callback (cla: yes, waiting for tree to go green, platform-windows, needs tests)