created src subdir.

src/util/xqexception.cpp

@@ -0,0 +1,20 @@
+/***************************************************************************
+
+    source::worx xtree
+    Copyright © 2024-2025 c.holzheuer
+    christoph.holzheuer@gmail.com
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+***************************************************************************/
+
+
+#include <xqexception.h>
+
+XQException::XQException(const QString& what, const QString& param )
+    : std::runtime_error( param.isEmpty() ? what.toStdString() : QString( "%1: %2" ).arg(what,param).toStdString( ) )
+{}
+