GoSlice as lib to avoid extra binary

[aligator]

Hi,

is there a specific reason you did not use GoSlice as lib? As you licensed SlicerA also AGPL it shouldn't be a problem, as long as you don't ship it directly with aroz and just provide it as extra, downloadable module.

This would make the handling of SlicerA more easy. It would also fix the permission problem I faced.

If it's ok from your side, I would create a PR for it.