Change the `revng opt` wrapper so that when a zstd-compressed module is passed it is decompressed on the fly and passed to llvm's opt.
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`.