First commit

Editor/Contracts/IInspectable.cs

@@ -0,0 +1,13 @@
+using System;
+using UnityEngine.UIElements;
+
+namespace Misaki.GraphView.Editor
+{
+    public interface IInspectable
+    {
+        public Action<IInspectable> OnItemSelected { get; set; }
+        
+        public string InspectorName { get; }
+        public VisualElement CreateInspector();
+    }
+}