[libc-commits] [libc] [libc]: Implement strfrom* functions and utils (PR #85438)

[Vinayak Dev via libc-commits]

vinayakdsci wrote:

@michaelrj-google Should I implement `stfromd()`and `strfroml()` within this PR only, or would it be better to do so in subsequent PRs?

https://github.com/llvm/llvm-project/pull/85438