consider adding CartoGRAPHs for visualization and DataDiVR export for VR based analysis

[sreichl]

both packages from MencheLab
https://github.com/menchelab/CartoGRAPHs
https://github.com/menchelab/VRNetzer -> now: https://github.com/menchelab/DataDiVR_WebApp

• discuss w/ RB
• discuss w/ Menchies e.g., Chris H.