Data extraction for nested teams

[PeterBowman]

A few weeks ago, GitHub introduced nested teams. In roboticslab-uc3m, teams TEXTILES and horus share the same repos, but the latter is showing zero contribs, issues and PRs: ref.

Also, I wonder if team relationship could be reflected somehow in the stats, e.g. with prefixes (TEXTILES/horus for team horus).

Another one: see team RoboFactory at asrob-uc3m (ref). It seems a bit weird to display no contribs/issues even if it's a mere container for six nested subteams, with no repos associated to it.