Integration of Coverage - Alpha Graph from https://arxiv.org/pdf/2102.06164

[Sharpz7]

Provides super cool visualisation to better help users understand where there result fits in the wider picture. It should be possible to include this in Retuve since it is aggregate data, that does not reveal any private details.

Retuve could even split by different relevant classes, i.e show subplots by gender, race etc, to reveal the niches that can occur there.

We should also provide the option to "build from your own data" - so hospitals can have their own regions as they want to define it.