Backend: Need custom vizualization plug-ins for participant plots in clinepi

[d-callan]

Live clinepi has participant plots for a handful of studies, like maled and a few icemr ones. We need to replicate them for phase 2 outside of dataplotter. Think that could be done wo plot.data. but means custom api that requires only a participant I'd in the request. Then the viz knows a collection of vars to request, has no var constraints and just reformats tabular data to json as needed.

[danicahelb]

We will add these custom plots into Mike's subset results table viewer, as they are at the level of the participant

[d-callan]

adding a question label bc i think we probably need to know how we mean to implement these before we can assign a cost.