refactor power

lib/core/enums/enums.dart

@@ -0,0 +1,28 @@
+import 'package:flutter/material.dart';
+
+enum AppThemeMode {
+  light('light', 'Chiaro', ThemeMode.light, Icons.light_mode),
+  dark('dark', 'Scuro', ThemeMode.dark, Icons.dark_mode),
+  system('system', 'Sistema', ThemeMode.system, Icons.brightness_auto);
+
+  const AppThemeMode(this.value, this.label, this.themeMode, this.icon);
+  final String value;
+  final String label;
+  final ThemeMode themeMode;
+  final IconData icon;
+
+  static AppThemeMode fromValue(String? value) {
+    return AppThemeMode.values.firstWhere(
+      (e) => e.value == value,
+      orElse: () => AppThemeMode.system,
+    );
+  }
+}
+
+enum PrefKeys {
+  theme('themeModeSetting'),
+  lastStore('lastStore');
+
+  const PrefKeys(this.value);
+  final String value;
+}