Implement the SpaceAddRoomsScreen. (#4951)

* Update proxies ready for adding rooms to a space.

- ClientProxy.recentlyVisitedRooms to take a filter and to return room proxies.
- Expose SpaceServiceProxy.addChildToSpace.

* Implement the SpaceAddRoomsScreen.

* Fix the designs of the selected carousels.

Add more snapshot tests for inviting users.

* Fix for screen using wrong avatar size.

ElementX/Sources/Mocks/SpaceServiceProxyMock.swift

@@ -38,6 +38,7 @@ extension SpaceServiceProxyMock {
         spaceForIdentifierSpaceIDClosure = { spaceID in
             .success(configuration.topLevelSpaces.first { $0.id == spaceID })
         }
+        addChildToReturnValue = .success(())
     }
 }