Added example project

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

example/lib/services/demo_service.dart

@@ -0,0 +1,33 @@
+import "package:arcane_framework/arcane_framework.dart";
+import "package:flutter/foundation.dart";
+import "package:uuid/uuid.dart";
+
+class IdService extends ArcaneService {
+  static final IdService _instance = IdService._internal();
+  static IdService get I => _instance;
+
+  IdService._internal();
+
+  bool _initialized = false;
+  bool get initialized => I._initialized;
+
+  String? _sessionId;
+  ValueListenable<String?> get sessionId =>
+      ValueNotifier<String?>(I._sessionId);
+
+  String get newId => uuid.v7();
+
+  /// The `Uuid` instance used for generating unique IDs.
+  static const Uuid uuid = Uuid();
+
+  Future<void> init() async {
+    Arcane.log(
+      "Initializing ID Service",
+      level: Level.debug,
+    );
+
+    I._sessionId = uuid.v7();
+    I._initialized = true;
+    notifyListeners();
+  }
+}