refactor: move GOP_test to plugin system

src/OpDefs/GopHouse.h

@@ -0,0 +1,15 @@
+#pragma once
+#include "Engine/Operator/GeometryOpDef.h"
+
+class GOP_house
+: public enzo::nt::GeometryOpDef
+{
+public:
+    GOP_house(enzo::nt::OpId opId);
+    virtual void cookOp(enzo::op::Context context);
+    static enzo::nt::GeometryOpDef* ctor(enzo::nt::OpId opId)
+    {
+        return new GOP_house(opId);
+    }
+
+};