integrate into verdi cli

[ltalirz]

Integrate running of the REST API into the verdi cli, essentially replacing the verdi restapi command.

Since we're using uvicorn here it's not quite clear to me whether this is straightforward; also this currently means removing access to the old restapi, i.e. we can only do this once we're at feature parity.

This is not blocking for any use cases and also does not affect architectural considerations; thus low priority.