Adds a new help center article to document the ability to edit bots,
both in personal and organization settings.
Adds a note about bot editing to "View all bots in your organization".
Fixes#21641.
Co-authored-by: Alya Abbott <alya@zulip.com>
This better sets expectatations for the fact that in Zulip, the
Organization settings UI is available read-only to non-administrator
users.
Tweaked by tabbott to update some additional references.