[wip] softy: add yunohost in software install script

[xoddark]

!!! Don't merge like this !!!

• add yunohost in debian-software script
• add yunhost info in readme Work for issue #149

todo: manage bullseye transition

Signed-off-by: xoddark xod@xoddark.com

[igorpecovnik]

We are not maintaining this script anymore in favour of https://github.com/armbian/configng