Added graph behavior example (graph that lives in a monobehavior)

Author: alelievr

Assets/Examples/BasicExample.asset

@@ -0,0 +1,35 @@
+using UnityEditor;
+using UnityEngine;
+using UnityEngine.UIElements;
+
+[CustomEditor(typeof(GraphBehaviour))]
+public class GraphBehaviourEditor : Editor
+{
+    Editor graphEditor;
+    GraphBehaviour behaviour => target as GraphBehaviour;
+
+    void OnEnable()
+    {
+        graphEditor = Editor.CreateEditor(behaviour.graph);
+    }
+
+    void OnDisable()
+    {
+        DestroyImmediate(graphEditor);
+    }
+
+    public override VisualElement CreateInspectorGUI()
+    {
+        var root = new VisualElement();
+        var graphContainer = graphEditor.CreateInspectorGUI().Q("ExposedParameters");
+
+        root.Add(new Button(() => EditorWindow.GetWindow<AllGraphWindow>().InitializeGraph(behaviour.graph))
+        {
+            text = "Open"
+        });
+
+        root.Add(graphContainer);
+
+        return root;
+    }
+}