list pending invites in INFO response
context
- admins often get confused about how many of the invitations they have issued to a channel have actually been accepted
- more specifically: they assume that because they have issued an invite, it has been accepted, but this is not always the case
- so.. to give them greater visibility into the state of invites, let's list the number of pending invites (to complement #341 (closed) and #342 )
behavior
WHEN an admin issues INFO
- THEN the top section of the response should include
pending invites: <number of pending invites on the channel>
open question
- do we want to give users a granular view of how many of their invites that they specifically issued are still pending?