introduce the radar screen to receive aircraft information

src/RadarScreen.cpp

@@ -0,0 +1,23 @@
+/*
+ * Author:
+ *   Sven Czarnian <devel@svcz.de>
+ * Brief:
+ *   Implements the RADAR display of EuroScope
+ * Copyright:
+ *   2021 Sven Czarnian
+ * License:
+ *   GNU General Public License v3 (GPLv3)
+ */
+
+#include "stdafx.h"
+
+#include "RadarScreen.h"
+
+using namespace aman;
+
+RadarScreen::RadarScreen() :
+        EuroScopePlugIn::CRadarScreen() { }
+
+RadarScreen::~RadarScreen() { }
+
+void RadarScreen::OnAsrContentToBeClosed() { }