ui: Added user interface for auto system header search paths detection

* moved detection files to lib_gui
* added ui to global header search and framework search ui in project wizzard and preferences
* detecting the search paths will add them to the list if not added yet
* only detected compilers are shown in the dropdown list

src/lib_gui/utility/utilityApp.cpp

@@ -0,0 +1,15 @@
+#include "utility/utilityApp.h"
+
+#include <QProcess>
+
+std::string utility::executeProcess(const char *cmd)
+{
+	QProcess process;
+	process.setProcessChannelMode(QProcess::MergedChannels);
+	process.start(cmd);
+	process.waitForFinished();
+	std::string processoutput = process.readAll().toStdString();
+	process.close();
+
+	return processoutput;
+}