Add a new RoomThreadListScreen and hook it up to the RoomThreadListService

It will automatically paginate to fill the screen and update the list as updates come in.

ElementX/Sources/Screens/RoomThreadListScreen/RoomThreadListScreenModels.swift

@@ -0,0 +1,25 @@
+//
+// Copyright 2025 Element Creations Ltd.
+//
+// SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+// Please see LICENSE files in the repository root for full details.
+//
+
+import Foundation
+
+enum RoomThreadListScreenViewModelAction { }
+
+struct RoomThreadListScreenViewState: BindableState {
+    var items = [RoomThreadListItem]()
+    
+    var isPaginating = false
+    
+    var bindings: RoomThreadListScreenViewStateBindings
+}
+
+struct RoomThreadListScreenViewStateBindings { }
+
+enum RoomThreadListScreenViewAction {
+    case oldestItemDidAppear
+    case oldestItemDidDisappear
+}