Auto-completion #33
Description
There is now a version of cmdliner with support for auto-completion (2.0).
This is a significant landscape change in comparison to when cmdlang was first initiated, thus this calls for updates in the doc, readme, roadmap, looking again at the API, etc.
In particular if there was a way to expose in the interface builders that'd be possible to convert to both cmdliner and climate, this should be a good addition to cmdlang. TBD.