[Feature Request] Add IGPR Plots

[TheEimer]

We've used IGPR plots (which are similar but different to the DeepCave footprints afaik) a bunch, maybe those could be added as a footprint option? In this notebook they're used for dynamic footprints, including all the necessary code: https://colab.research.google.com/drive/1VjWng8KeGiW1RnsU6FYriaxAOxkBooXc

I guess dynamic mode is a bigger add on and not realistic in the near future? We'd be very happy over here!