add token as an alias for auth

`influx auth` matches the API, but it's not what a user thinks about when they want to work with tokens. we should consider an alias that is `influx token` for this command.

Start by locating the CLI entry point for the existing `influx auth` command and inspect how command aliases are defined. Done means `influx token` invokes the same behavior as `influx auth`, while the existing command continues to work; check any nearby command tests if they exist.

Written by the indexing model from the issue text.