ETS2 - Liaz 400 Xena Truck

Changes:
The archive has been unlocked
Removed a lot of rubbish and debris.
Fixed work of on-board computer and GPS navigator.
Fixed display of side mirrors.
All files are converted.
Fixed sounds + added new engines and sounds.

Authors: Authors: Honza Blinka, Stas556, GalimimHelp in the reconstruction of the truck: Master_Yoda.Adaptations and bug fixes: AJIEHA