Eliminate exceptions without message reaching api_return_error

[agners]

Description

The generic API handler api_return_error converts exceptions without message into "Unknown error, see supervisor". Such errors are not very useful to users, we should replace them with custom exception classes along with a user friendly message telling what is wrong.

Let's eliminate obvious/known cases where we raise Exceptions without messages first, then capture such events in Sentry to find other commonly occurring errors without messages.

Additional context

No response

[agners]

One of the issues seen in Support is when people are using ha auth reset --username test --password <newpw>, so far this lead to:

Error: Unknown error, see Supervisor logs

Which very much sounds like a problem with the command in first place. Since we have ha auth reset --interactive which lists users as well, the message should make clear that the username is wrong.