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/services/api/network_exception.dart

@@ -1,5 +1,4 @@
 import 'package:dio/dio.dart';
-import 'package:html/parser.dart' as parser;
 
 abstract class Failure {
   final String errMessage;