Converted all the devices models to extends from DeviceModel for the purpose of unifying.

Initialized Lights feature.

lib/features/devices/bloc/lights/lights_cubit.dart

@@ -0,0 +1,9 @@
+import 'package:flutter_bloc/flutter_bloc.dart';
+
+part 'lights_state.dart';
+
+class LightsCubit extends Cubit<LightsState> {
+  LightsCubit() : super(LightsInitial());
+
+  static LightsCubit get(context) => BlocProvider.of(context);
+}