Add NotificationManager and NotificationLabel for age advancement notifications; refactor scripts into Components directory

Scripts/Components/NotificationManager.cs

@@ -0,0 +1,31 @@
+using Godot;
+using ParasiticGod.Scripts;
+using ParasiticGod.Scripts.Singletons;
+
+namespace ParasiticGod.Scripts.Components;
+
+[GlobalClass]
+public partial class NotificationManager : CanvasLayer
+{
+    [Export] private PackedScene _notificationLabelScene;
+    
+    public override void _Ready()
+    {
+        GameBus.Instance.AgeAdvanced += OnAgeAdvanced;
+    }
+
+    public override void _ExitTree()
+    {
+        if (GameBus.Instance != null)
+        {
+            GameBus.Instance.AgeAdvanced -= OnAgeAdvanced;
+        }
+    }
+
+    private void OnAgeAdvanced(string ageName)
+    {
+        var notification = _notificationLabelScene.Instantiate<NotificationLabel>();
+        AddChild(notification);
+        notification.ShowNotification($"You have entered\n{ageName}!");
+    }
+}