Membership aware room routes (#2709)

* Remove the invites button when room list invites are enabled

* element-hq/element-x-ios/issues/2632 - Handle room permalinks based on their membership state and show the according room joining screens:
- modify the room flow coordinator to only take a roomID and be able to decide its own room flows (especially for unjoined rooms)
- add support for the new room preview API
- have RoomDirectorySearch go through the same paths

ElementX/Sources/Screens/JoinRoomScreen/JoinRoomScreenViewModelProtocol.swift

@@ -20,4 +20,6 @@ import Combine
 protocol JoinRoomScreenViewModelProtocol {
     var actionsPublisher: AnyPublisher<JoinRoomScreenViewModelAction, Never> { get }
     var context: JoinRoomScreenViewModelType.Context { get }
+    
+    func stop()
 }