new api for relay mgmt.

its in queue for 'very next thing' to work on.  i already have an api, but, i think its auth is probably too hard, so im working on using nip98 auth for a new api endpoint modeled after https://github.com/nostr-protocol/nips/pull/1325

obviously this nip, doesnt include the inception of creating a relay, but you get the idea..  thoughts?

also if u want to use rt api *now (and then get more standard later), i can show you how to do so.