COMPAS SLICER stylizing

[joburger]

Currently, it is inconsistent how compas slicer is described in text. Sometimes it is compas_slicer (with an underscore), sometimes COMPAS_SLICER (with capitals) and sometimes just compas slicer (no capitals).

I think we should try to be consistent here and it would probably make most sense if we consistently write it as COMPAS SLICER (capital letters but no underscore), following the example of COMPAS FAB. What do you think @Ioanna21 ?