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/Services/Spaces/SpaceServiceProxyProtocol.swift

@@ -23,4 +23,7 @@ protocol SpaceServiceProxyProtocol {
     func leaveSpace(spaceID: String) async -> Result<LeaveSpaceHandleProxy, SpaceServiceProxyError>
     /// Returns all the parent spaces of a child that user has joined.
     func joinedParents(childID: String) async -> Result<[SpaceServiceRoomProtocol], SpaceServiceProxyError>
+    
+    /// Adds a room (or space) as a child of another space.
+    func addChild(_ childID: String, to spaceID: String) async -> Result<Void, SpaceServiceProxyError>
 }