chore: move to qt/ directory

qt/main.cpp

@@ -0,0 +1,11 @@
+#include "snigdhaosassistant.h"
+
+#include <QApplication>
+
+int main(int argc, char* argv[])
+{
+    QApplication a(argc, argv);
+    SetupAssistant w(nullptr, a.arguments().length() > 1 ? a.arguments()[1] : "");
+    w.show();
+    return a.exec();
+}