Release 24.0

Please cut a new release so that downstream projects can leverage the new [PEP 703](https://peps.python.org/pep-0703/)  compatibility (no-gil, free-threaded).

 xref: https://github.com/pypa/pip/issues/11715#issuecomment-1856508343 / https://github.com/pypa/pip/pull/12300