[feature] Instance admin announcements

[tsmethurst]

Mastodon (and other implementations?) allow instance admins to set instance admin announcements which show in a separate bar at the top of the client. This isn't a big priority in GoToSocial currently because we focus on small instances where everyone knows everyone. But for instances that get a little bigger, it would be nice to have something comparable to this announcement facility.

Not all client apps actually show announcements, as far as I know, so we should consider whether we want to also implement some alternative ways of getting eyeballs on announcements. For example:

• Allow admins to set some kind of "send_email" boolean when creating an announcement, which emails a copy of the announcement to instance denizens.
• Allow admins to set "pin_to_timeline" boolean when creating an announcement, which causes the announcement to be pinned at the top of each user's home timeline, which prettymuch guarantees that they'll see it.

This is pretty low priority since, well, there's only a meager handful of instances with more than a few users, just jotting it down here before I forget.

[daenney]

Tuba has a separate section in the app for it. But it's also the only one that I'm aware of that does that.

[VyrCossont]

Feditext displays instance announcements. They're under the Explore tab, which will display a badge if there are some the user hasn't read yet. (If there are no announcements, the Announcements navigation link will not be shown at all.)

[benjaminbhollon]

alternative ways of getting eyeballs on announcements

RSS could be a pretty good option for this. Doesn't require the admin to have set up an IMAP server and is more opt-in than email.