Use brilliant workaround to show Windows 10 top border

Sine Striker

2023-12-24 46285db399f75154ad6c451e12f2cae2e59ace25

 examples/mainwindow/main.cpp

@@ -3,7 +3,7 @@
#include "mainwindow.h"

int main(int argc, char *argv[]) {
    qputenv("QT_WIN_DEBUG_CONSOLE", "1");
    qputenv("QT_WIN_DEBUG_CONSOLE", "attach");
    qputenv("QSG_INFO", "1");
#if 0
    qputenv("QT_WIDGETS_RHI", "1");