2.0: make `spacetime publish` `--yes` argument an enum

Right now the options are a bit confusing for publish:

--break-clients can be specified if you want to skip the "are you sure you want to break clients" prompt, but it won't break clients if there isn't a breaking change.

--yes responds yes to all prompts except the login prompt

TODO

We'd like --yes to instead be an enum which can accept the following things:

--yes all|migrate|break-clients|skip-login

remote - responds yes (if applicable) to the prompt: "Are you sure you want to publish to a remote server?"
migrate - responds yes (if applicable) to the prompt: "Are you sure you want to migrate?"
break-clients - responds yes (if applicable) to the prompt: "Are you sure you want to break clients?"
skip-login - responds no (if applicable) to the login prompt
--all is the same as remote|migrate|break-clients|skip-login

multiple options can be specified, like:

# skip prompts for migrations and login but not for breaking clients
spacetime publish --yes "migrate|skip-login"

Start by locating the spacetime publish CLI entry point and the existing handling for --yes, --break-clients, and the listed prompts. Trace how prompt responses are selected, then verify that the requested enum values and combinations produce the described responses for remote publishing, migration, breaking clients, and login.