Add Qt libs and headers

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

@@ -0,0 +1,34 @@
+// Copyright (C) 2013 BlackBerry Limited. All rights reserved.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+#ifndef QFILESELECTOR_H
+#define QFILESELECTOR_H
+
+#include <QtCore/QObject>
+#include <QtCore/QStringList>
+
+QT_BEGIN_NAMESPACE
+
+class QFileSelectorPrivate;
+class Q_CORE_EXPORT QFileSelector : public QObject
+{
+    Q_OBJECT
+public:
+    explicit QFileSelector(QObject *parent = nullptr);
+    ~QFileSelector();
+
+    QString select(const QString &filePath) const;
+    QUrl select(const QUrl &filePath) const;
+
+    QStringList extraSelectors() const;
+    void setExtraSelectors(const QStringList &list);
+
+    QStringList allSelectors() const;
+
+private:
+    Q_DECLARE_PRIVATE(QFileSelector)
+};
+
+QT_END_NAMESPACE
+
+#endif