[llvm-branch-commits] [libc] [docs] Rewrite libc docs from reST to markdown (PR #208374)

[Reid Kleckner via llvm-branch-commits]

rnk wrote:

I did note that there is a gendoc action that generates rst. I will leave that to you all to migrate to myst if you like.

https://github.com/llvm/llvm-project/pull/208374