Background

We have some further changes to make to spacetime server for 1.0 stability.

Definition of "Done"

[ ] On the spacetime server subcommands, un-name the server arg itself
[ ] Name the url arg to spacetime server add
[ ] Update spacetime server edit params
- [ ] Combine --host and --protocol into a --url parameter (to match how spacetime server add takes its input)
- [ ] Rename --nickname to --new-name to clarify that this is the param for the new name (i.e. not specifying the server that is being edited)