Partially implemented the page view functionality

-page controller on change need to be figured correctly

lib/features/app_layout/bloc/spaces_state.dart

@@ -17,3 +17,11 @@ class SpacesSelected extends SpacesState {
 
   SpacesSelected(this.space);
 }
+
+class RoomSelected extends SpacesState {
+  final RoomModel room;
+
+  RoomSelected(this.room);
+}
+
+class RoomUnSelected extends SpacesState {}