C++ 20 named modules with clang-cl is finally added in CMake 4.4

I've been using named modules in my hobby C++ projects for years but they always trigger some unexpected ICEs when I used MSVC, and I got really tired of experimenting workarounds. After I switched to clang-cl recently, all the related problems I've encountered so far were resolved. The only thing missing now is import std

https://redd.it/1v1hq9a
@r_cpp