LLVM 19.1.0 Release.

Release announcement and changelog here: https://discourse.llvm.org/t/llvm-19-1-0-released/81285

A note on binaries

The binaries and sources here are created by a release manager of LLVM and should all be signed with a GnuPG key. The official public keys can be found here: https://releases.llvm.org/release-keys.asc. We recommend verifying the sources or tags before using them.

The binaries can take a while to show up since they require some manual input.

Third party binaries can be found on the discourse forums (link forthcoming).