[clang-tools-extra] [llvm] [llvm] add support for mustache templating language (PR #105893)

[Paul Kirth via cfe-commits]

https://github.com/ilovepi commented:

Overall a good start, but I think we can tighten up the implementation in a few places, and improve the documentation here quite a bit.

I'd also like to see a somewhat expanded comment block in the header, describing the overall design of the library. This is a pattern you'll see a lot in LLVM, and its usually appreciated.

https://github.com/llvm/llvm-project/pull/105893