feat: initial import

Helpers/NodeExtensions.cs

@@ -0,0 +1,19 @@
+using System;
+using Godot;
+
+namespace GodotHostTest.Helpers;
+
+public static class NodeExtensions
+{
+    public static void AddTo(this IDisposable disposable, Node node)
+    {
+        node.TreeExited += OnTreeExited;
+        return;
+
+        void OnTreeExited()
+        {
+            disposable.Dispose();
+            node.TreeExited -= OnTreeExited;
+        }
+    }
+}