Make `ls https://dandiarchive.org/dandiset/{dandisetid}/` list version records and not a specific (draft or released) one

Pretty much it should correspond to `/dandisets/{dandiset__pk}/versions/` DANDI API call then.

This would allow for people (or scripts) to quickly get an idea on the versions of dandisets available.

Note: API does not return "draft" as a version but it should imho be listed if there is a draft for the dandiset, although it would lack metadata on when published, it should have metadata on when last updated. With some harmonization of the dates it should be possible to sort to quickly see either draft is ahead of the latest release.

cons:
- what to do for `DANDI:` isn't clear and how to complement it with the version