Add Clang Stubfiles
For the longest time using clang as been rather annoying on python 3 since the entire library lacks typehinting and I have been using clang for developing bindings as well as other CPython & Cython Related projects. I have already attempted to make a pull request to the python clang maintainers to add stub files with no avail or responses. So I thought moving this here would be a better temporary solution for the time being. Feel free to provide me with feedback if there's anything I need to change as I plan to add a few more in the future such as the third party library pyduktape2 which currently has had suffered from the same outcome.
According to mypy_primer, this change has no effect on the checked open source code. 🤖🎉
Please note that you will need a stubs/clang/METADATA.toml file describing these stubs. See CONTRIBUTING.md for more information and the other METADATA.toml files in this repository for examples.
Another build failure is due to the pyright strict config. This should be solved by adding stubs/clang to pyrightconfig.stricter.json's exclude key. There are also some mypy errors here:
https://github.com/python/typeshed/actions/runs/15101805593/job/42443806988?pr=13933