[libcxx-commits] [libcxx] [libc++] Add `ranges::fold_left_first` and ranges::`fold_left_first_with_iter` (PR #121558)

[A. Jiang via libcxx-commits]

https://github.com/frederick-vs-ja approved this pull request.

Tentatively approving. I pushed changes which added release notes to the documentation. @JCGoran Please confirm whether these notes are fine.

https://github.com/llvm/llvm-project/pull/121558