[clang] [clang-tools-extra] [clang-tidy] Add experimental header-filter matching (PR #194370)

[Zeyi Xu via cfe-commits]

https://github.com/zeyi2 commented:

Thank you for working on this.

This is quite a large diff, and unfortunately I have limited bandwidth at the moment, so I can only leave some style-related comments for now. 

I’ll try to take a closer look and provide a more detailed review later.

https://github.com/llvm/llvm-project/pull/194370