next steps after merging other PR

[cordoval]

todo:

depending on #2

• add tests
• refactor into Gush helpers
• move to repo
• try to unify clients and don't allow new outside services/helpers
• fix progress helper usage
• fix wrongly extension of command implementations
• make commands implemented more flexible and linux-like unitary
• try to create adapter based on the commands / seeing how this can be converted into a command extension? cc/ @sstok any ideas?
• others still thinking on these 😊