z2-Environment

Currently the dev repo is the only repository implementation that actively hides modules of repos of lower prio, rather then just covering up components.

That should be the default behavior however. In particular it would allow to have system definitions where

core --(sys repo) --> base
core --(app repo) --> app

and the app repo actually defines the environment. So that base is runnable albeit very basic and by adding another, higher prio app repo, the scenario can
be easily added on top