Add non-attended mode for Qt 3D Kria cluster demo

It would be nice to have some more animations going on in the "non-attended" mode. The demos are usually just there w/o any interaction at booths. Create a demo which switches between the different views (gauges, map, etc) every few seconds. This creates much more movement and therefore is more attractive.

Consider a timer that triggers if nobody interacts with the UI in 30 seconds it starts doing transitions automatically between UI states every 5-10 seconds (experiment to find a good value for this).