windows on arm(woa, arm64) support

[busylog]

with the msbuild script modified from https://github.com/itlezy/eMule-build I can finally do arm64 build for 0.60d and 0.70a with vs2022 v143 toolchain.

I have to delete some function in order to build, so this is only a draft pr.

[irwir]

Thanks for this proof of concept.
Proper build is even simpler: 0.70b code was untouched, only projects and the solution modified.

Native ARM builds were discussed a while ago, but WOA systems are rare and the hardware is not at hand.
Now, basic tests of the executable could be done in a virtual machine with ARM emulation.
Then possibility of ARM64 build in the next release might be considered.