Adds initial intermediate qt6 porting state

qt6-after/qt6-migrated-legatus/Lts/Plugins/Evaluations/evl_gui_plugin_interface.h

@@ -0,0 +1,22 @@
+
+
+
+#pragma once
+
+#include <TopicEditorBase/topic_editor_interface.h>
+#include <QString>
+
+namespace Evaluations
+{
+
+class ForeignGuiInterface : public TopicEditorBase::Interface
+{
+public:
+  ForeignGuiInterface() = default;
+  virtual ~ForeignGuiInterface() = default;
+
+  static QString pluginName() { return QStringLiteral("EvlEvaluationGuiPlugin"); }
+
+};
+
+}