WIN32: provide an executable for WOA64

[carlo-bramini]

I'm wondering if it could be possible to release an executable for running natively on PCs with Windows for ARM64 (WOA64).
It is an easy task, at least in my opinion, because it can be built exactly like WIN32 or WIN64, by using aarch64-w64-mingw32 cross compiler.
If the engine can be built with MSVC, then the WOA64 executables can be generated also with the free compiler from Microsoft.

Actually, I cloned the sources and I already compiled crispy-doom for WOA64 myself without difficutlies.
Everything seems to be fine at the same try.
However I was wondering if you could make a release also for this platform in the future, near the existing packages in your download section.

Thank you very much.