Fixes #918, #919 - Introduce a RoomTimelineFlowCoordinator and related FlowCoordinator protocol

Squashed commits:
Add unit tests and move the state machine into the FlowCoordinator
[bb686861] Replace the RoomFlowCoordinator's public interface with just `handleAppRoute`
[0d9a4f8d] Remove the navigationStackCoordinator dependency from the roomScreenCoordinator
[4b5fbdf2] Allow rooms to be selected from any other state
[41dbd127] Move all missing coordinators to the RoomFlowCoordinator and state machines
[f32431b7] The UserSessionFlowCoordinator does not need to conform to the CoordinatorProtocol
[0f07e87d] Fix leaving a room dismissing the currently selected one when different
[138385a2] Rewind the navigation stack when re-selecting the same room (iPad)
[0727eb93] Fix presenting different room details from the side menu on iPads
[faf4cc60] Fix selecting the same room multiple times
[fb3391da] Move room details presentation responsibility to the RoomFlowCoordinator. Fixed invitation flows.
[fa2a68d9] Rename RoomTimelineFlowCoordinator -> RoomFlowCoordinator
[0c9c06b5] Start moving things away from the RoomScreenCoordinator and into the RoomTimelineFlowCoordinator
[86cbbdcc] Introduce a RoomTimelineFlowCoordinator to deal with timeline related operations
[9b2381be] Introduce the FlowCoordinatorProtocol

ElementX/Sources/Application/FlowCoordinatorProtocol.swift

@@ -0,0 +1,22 @@
+//
+// Copyright 2023 New Vector Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+import Foundation
+
+@MainActor
+protocol FlowCoordinatorProtocol {
+    func handleAppRoute(_ appRoute: AppRoute, animated: Bool)
+}

ElementX/Sources/Application/Navigation/AppRouter.swift

@@ -19,7 +19,9 @@ import Foundation
 import URLRouting
 
 enum AppRoute {
+    case roomList
     case room(roomID: String)
+    case roomDetails(roomID: String)
 }
 
 struct AppRouterManager {