Link "join space" and "join room"

### Your use case

#### What would you like to do?

Being able to join a room but not join the containing space feels somewhat confusing.
I think it would be great if space/room admins could link the join behaviour of these two systems together.

So if I generate a share link to a room I would also have people be prompted to join the space, and vice versa (not just having suggested rooms in a space but auto-joining say 1-2 "default" rooms).

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

While a space is "just" a special sort of room, it feels like something that is going to be confusing to people if they can join a room, but then have no indicator of the space the room is a part of.

So they need to follow 2 invites: one for the room and one for the space. That seems redundant. An alternative is to have the topic of every room contain an invite link to the containing space which also feels very sub-optimal.

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

Ideally this would be some metadata on the invite links, so that I can have invite links for each room that _also_ invite people to the containing space.

Also, being able to see whether a room is contained in a space (maybe similarly to how publish addresses work?) would be a good solution for anyone already in a room that is part of a space they are not a member of yet.

### Have you considered any alternatives?

_No response_

### Additional context

_No response_