moveWindow function
MoveWindow moves window to the specified position.
For further details, please see: https://docs.opencv.org/master/d7/dfc/group__highgui.html#ga8d86b207f7211250dbe6e28f76307ffb
Implementation
void moveWindow(String winName, int x, int y) {
final cWinName = winName.toNativeUtf8().cast<ffi.Char>();
cvRun(() => chighgui.cv_moveWindow(cWinName, x, y));
calloc.free(cWinName);
}