Add Qt libs and headers

paho-mqtt3as-proxy/Qt/include/QtCore/qfunctionpointer.h

@@ -0,0 +1,23 @@
+// Copyright (C) 2022 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+#ifndef QFUNCTIONPOINTER_H
+#define QFUNCTIONPOINTER_H
+
+#include <QtCore/qtconfigmacros.h>
+
+#if 0
+#pragma qt_class(QFunctionPointer)
+#endif
+
+#if defined(__cplusplus)
+
+QT_BEGIN_NAMESPACE
+
+typedef void (*QFunctionPointer)();
+
+QT_END_NAMESPACE
+
+#endif // __cplusplus
+
+#endif // QFUNCTIONPOINTER_H