check for build requirements and abort build process if not satisfied

[bmerkle]

• python>=3.9
• cmake>=3.22
• clang>=18 on windows use the msvc-clang (>=17)

fix https://github.com/microsoft/BitNet/issues/34

[bmerkle]

@potassiummmm can you have a look at this? IMO checking for prerequisites will avoid a lot of user bug reports 😉.

[bmerkle]

merge conflict resolved

[potassiummmm]

Thanks for your work! We are working on resolving toolchain dependencies, so the current version limitations may not be mandatory.

[bmerkle]

@potassiummmm I understand. However in our build environment / embedded area we usually check for tool names and also tool versions, so IMO we are on a safer side if we check it (at least the minimal required versions). And the implementation is already there with this patch/PR :-) What do you think ?