Use the `setup` function mechanism to register the command instead of directly importing the commands registry.
fixModel
Instead of getting reimplemented/updated, it now just reuses normal type verification routines.
Package revng's python code in two wheels: `revng` and `revng_internal`. The revng wheel contains the `revng.{pipeline_description,model,tupletree}` modules, while the `revng_internal` one everything under `revng.internal`.