Windows on Arm64 Installer

[wbsdty331]

Is your feature request about something that is currently impossible or hard to do? Please describe the problem.
Currently vim-win32-installer only provide i386 and x86_64 installer. our years ago Vim has Windows ARM64 support
I think you could add support for it.

Describe the solution you'd like
provide arm64 installer like this gvim_9.0.1310_arm64.exe

Describe alternatives you've considered
Windows 11 arm64 provide a x64 emulation engine, youcan still use x86/x64 version but maybe have perf loss.

Additional context
nsis arm64 support : https://sourceforge.net/p/nsis/feature-requests/547/
It looks like we can build it for arm64-windows but have some limitions.