Show competitors' group data from WCIF

[sarahstrong314]

This is a feature request. It would be a massive time-saver if we could view a competitor's group number and stage instead of looking it up on competitiongroups.com every time. I imagine "See group info" being available in this menu:

[FinnIckler]

This will be part of the WCA Live integration into the Main website, so I am not sure if it's worth implementing this in the Elixir code base.