Enable group organizers to archive/close event chat rooms for better user experience.

"Enable group organizers to archive/close group chats. This would allow us to enable a ""chat room"" for a particular event or day that can be closed and archived. For example - let's say a group on the platform is having an event on Jan. 1st. On Jan 1st the chat room is spun up - a link appears in the main group activity feed that a chat has started and anyone who clicks on the link can enter and is subscribed to the chat. The chat is used for the event