This is the first debian loader implementation.
The goal is to align right now the behaviors in-between implementations (D2135)
to decrease the friction area.
Also update the loader's cli sample from the main entry point with something
that actually runs independently of the lister-db's state. The previous sample
would not create any content/directory/revision... (in docker-dev because
the lister-db is not pre-populated).
Related D2137
Related D2135