`zbus_names` is unmaintained

The `zbus_names` crate is no longer maintained as a standalone crate.

It has been merged into [`zbus`](https://crates.io/crates/zbus) starting with version `6.0.0`, as its `names` module.

Users should migrate to [`zbus`](https://crates.io/crates/zbus), with its default features disabled if they only need the D-Bus name types.