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.

AccessibilityTests/Sources/GeneratedAccessibilityTests.swift

@@ -591,6 +591,10 @@ extension AccessibilityTests {
         try await performAccessibilityAudit(named: "RoomSelectionScreen_Previews")
     }
 
+    func testRoomThreadListScreen() async throws {
+        try await performAccessibilityAudit(named: "RoomThreadListScreen_Previews")
+    }
+
     func testSFNumberedListView() async throws {
         try await performAccessibilityAudit(named: "SFNumberedListView_Previews")
     }