Updated example to add a services example

Signed-off-by: Hans Kokx <hans.d.kokx@gmail.com>

example/lib/services/favorite_color_service.dart

@@ -0,0 +1,43 @@
+import "package:arcane_framework/arcane_framework.dart";
+import "package:flutter/material.dart";
+
+class FavoriteColorService extends ArcaneService {
+  static final FavoriteColorService _instance =
+      FavoriteColorService._internal();
+
+  static FavoriteColorService get I => _instance;
+
+  FavoriteColorService._internal();
+
+  MaterialColor? get myFavoriteColor => _notifier.value;
+
+  final ValueNotifier<MaterialColor?> _notifier =
+      ValueNotifier<MaterialColor?>(null);
+
+  ValueNotifier<MaterialColor?> get notifier => _notifier;
+
+  void setMyFavoriteColor(MaterialColor? newValue) {
+    if (_notifier.value != newValue) {
+      _notifier.value = newValue;
+    }
+
+    notifyListeners();
+  }
+}
+
+extension ColorName on MaterialColor {
+  String get name {
+    final double red = double.parse(r.toStringAsFixed(4));
+    final double green = double.parse(g.toStringAsFixed(4));
+    final double blue = double.parse(b.toStringAsFixed(4));
+    if (red == 0.9569 && green == 0.2627 && blue == 0.2118) return "red";
+    if (red == 1 && green == 0.5961 && blue == 0) return "orange";
+    if (red == 1 && green == 0.9216 && blue == 0.2314) return "yellow";
+    if (red == 0.2980 && green == 0.6863 && blue == 0.3137) return "green";
+    if (red == 0.1294 && green == 0.5882 && blue == 0.9529) return "blue";
+    if (red == 0.6118 && green == 0.1529 && blue == 0.6902) return "indigo";
+    if (red == 0.4039 && green == 0.2275 && blue == 0.7176) return "violet";
+
+    return "";
+  }
+}