[libcxx-commits] [libcxx] [libcxx] P2278R4: implement `{basic_, }const_iterator`, and have `cbegin` et. al. return it (PR #99915)

[Louis Dionne via libcxx-commits]

ldionne wrote:

@strega-nil There were lots of conflicts due to some changes I've made to the status pages. I should have resolved everything and this should be ready for review IIUC.

https://github.com/llvm/llvm-project/pull/99915