Description

As we migrate to a cleaner bk <thing> <action> format we should consider that the use command doesn't follow this.

Changes

• adds a select subcommand to the auth command family
  • use is bk auth select
• adds testing for using the new command
• continues support for bk auth select [org-slug]
• aliases bk auth select to bk auth use to maintain a similar command
• "hides" use from the root so that --help don't output it as an option

Testing

• Tests have run locally (with go test ./...)
• Code is formatted (with go fmt ./...)