Support "peeking" at a room's messages

### Your use case

#### What would you like to do?

I would like to be able to "peek" at a room I'm already in: view the messages but not clear the thread notification counts.

#### Why would you like to do it?

Sometimes, especially at night I'll see a message come in to a room where I suspect it will be something I'll need to respond to the next day. I'd like to view the messages and backlog right then, though, in case it is urgent or very easy to respond to.

#### How would you like to achieve it?

By right-clicking the room and clicking "peek" or something. I'm not a UX person :). Since this appears to be technically tied to the read receipt behavior, I assume it would also not send read receipts.

### Have you considered any alternatives?

Achieving better work-life balance, but it is very hard with a small company and 24/7 community.

### Additional context

_No response_