Implement the ability to archive groups

User request: As a user, I'd like the ability to archive groups that I've created, so that I can edit the groups list I'm a part of to keep it current

From this email: https://mail.google.com/mail/u/0/#inbox/159bc7e52681d781

Start with the linked email and screenshot to clarify what archiving a group means and how archived groups should appear in the user's group list. Identify the relevant group-list and group-management entry points, then define completion around creating an archive action and keeping archived groups out of the active list.

Written by the indexing model from the issue text.