mici: add prime / account page

[adeebshihadeh]

show things like prime status and the account it's paired to

[varshneydevansh]

I'd like to take this one. It looks like most of it
can be done locally without needing hardware.

Quick question before I start for “the account
it’s paired to”, what should we show exactly?

From the current code, PrimeState fetches
this endpoint:

openpilot/selfdrive/ui/lib/prime_state.py

Line 56 in cd2c590

response = api_get(f"v1.1/devices/{dongle_id}", timeout=self.API_TIMEOUT, access_token=identity_token, session=self._session)

but it currently only extracts is_paired and
prime_type. Should the account value also
come from that response, or is there another
endpoint/field we should use?