Add proost program (CLI)

Add the CLI version of proost

changed milestone to %Alpha release

added Doing label

assigned to @aalbert

created branch 5-add-proost-program-cli to address this issue

mentioned in merge request !5 (closed)

added To review label

removed Doing label

added Doing label and removed To review label

added To review label and removed Doing label

added Doing label and removed To review label

created branch 5-add-proost-program-cli-2 to address this issue

mentioned in merge request !8 (merged)

added To review label and removed Doing label

added Toplevel label

closed with merge request !8 (merged)

closed with commit c47a91c0

mentioned in commit c47a91c0

mentioned in commit 10310362

removed To review label

mentioned in commit bb4dce54

mentioned in commit 5b58307f

mentioned in commit 65e7fbd3