Refactor device control logic and add temperature and fan speed enums

- Refactor device control logic in the app to improve readability and maintainability.
- Add temperature modes (hot, cold, wind) and fan speeds (auto, low, middle, high) enums.
- Update icon mappings and utility functions for temperature modes and fan speeds.

lib/features/shared_widgets/devices_default_switch.dart

@@ -23,7 +23,7 @@ class DevicesDefaultSwitch extends StatelessWidget {
             Expanded(
               child: InkWell(
                 onTap: () {
-                  DevicesCubit.get(context).turnOnOffDevice(model);
+                  DevicesCubit.getInstance().turnOnOffDevice(model);
                 },
                 child: Container(
                   height: 60,
@@ -49,7 +49,7 @@ class DevicesDefaultSwitch extends StatelessWidget {
             Expanded(
               child: InkWell(
                 onTap: () {
-                  DevicesCubit.get(context).turnOnOffDevice(model);
+                  DevicesCubit.getInstance().turnOnOffDevice(model);
                 },
                 child: Container(
                   height: 60,