Kernelshark: migrate to Qt 6

[Jerome Marchand <jmarchan@xxxxxxxxxx>]

Hi,

Qt 5 is reaching end-of-life and Qt 5.15 appears to be the last Qt 5 
version. Is there any plan to port kernelshark to Qt 6?

I have no experience with Qt devel, but it seems that some effort has 
been made to keep the migration easy:
https://doc.qt.io/qt-6/portingguide.html
https://www.qt.io/blog/porting-from-qt-5-to-qt-6-using-qt5compat-library

Thanks,
Jerome