Add **Behavior Tree** asset type and editing

Source/Engine/AI/BehaviorTreeNodes.cpp

@@ -0,0 +1,20 @@
+// Copyright (c) 2012-2023 Wojciech Figat. All rights reserved.
+
+#include "BehaviorTreeNodes.h"
+#include "Engine/Serialization/Serialization.h"
+
+void BehaviorTreeNode::Serialize(SerializeStream& stream, const void* otherObj)
+{
+    SerializableScriptingObject::Serialize(stream, otherObj);
+
+    SERIALIZE_GET_OTHER_OBJ(BehaviorTreeNode);
+    SERIALIZE(Name);
+}
+
+void BehaviorTreeNode::Deserialize(DeserializeStream& stream, ISerializeModifier* modifier)
+{
+    SerializableScriptingObject::Deserialize(stream, modifier);
+
+    Name.Clear(); // Missing Name is assumes as unnamed node
+    DESERIALIZE(Name);
+}