feature: Add QtPlugin templates.

etc/templates/qt_plugin/QtPlugin.in.cpp

+// This file was auto generated from `@QT_PLUGIN_SOURCE_FILE@`.
+
+#include "QtPlugin.h"
+#include <@QT_WIDGET_CONTROLLER_INCLUDE@>
+
+namespace @QT_PLUGIN_NAMESPACE@
+{
+    QtPlugin::QtPlugin()
+    {
+        addWidget<@QT_WIDGET_CONTROLLER_FQ_NAME@>();
+    }
+}

etc/templates/qt_plugin/QtPlugin.in.h

+// This file was auto generated from `@QT_PLUGIN_SOURCE_FILE@`.
+
+#pragma once
+
+#include <ArmarXCore/core/system/ImportExportComponent.h>
+#include <ArmarXGui/libraries/ArmarXGuiBase/ArmarXGuiPlugin.h>
+#include <ArmarXGui/libraries/ArmarXGuiBase/ArmarXComponentWidgetController.h>
+
+namespace @QT_PLUGIN_NAMESPACE@
+{
+    class ARMARXCOMPONENT_IMPORT_EXPORT QtPlugin:
+            public ::armarx::ArmarXGuiPlugin
+    {
+        Q_OBJECT
+        Q_INTERFACES(ArmarXGuiInterface)
+        Q_PLUGIN_METADATA(IID "ArmarXGuiInterface/1.00")
+
+    public:
+        QtPlugin();
+    };
+}