WaveShare 5" DSI for PrusaBox, with X735 PSU shield

This is an option to mount the WaveShare 5" DSI Display and a PI4 with a X735 shield (https://geekworm.com/products/raspberry-pi-x735-safe-shutdown-auto-cooling-expansion-board) onto the Prusa-Box from https://www.printer-box.com.

Add push button for start and stop the PI, with the script : https://github.com/thorkseng/x735-v2.5

Space between the back of the screen and the front plate allow air flow for the raspberry pi case