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

[via llvm-commits]

PeterChou1 wrote:

> @PeterChou1 It's been a few weeks since we've seen progress here. Is this something you're planning to finish out? or should @petrhosek or I should dedicate some effort into getting landed? The Clang-Doc refactor to use the templates is going to be hard to review until this is in, and I'd very much like to see all your work in tree as soon as possible. Mostly, because we want to start using it.

I can put in the work to land it this week. I think this PR already looks good, I think once @AaronBallman takes it look at and give the approval it should be ready




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