add hierarchy and corresponding test dataset example for a typical health system

[MaxDiz]

new user feedback:

Understanding the hierarchy of a typical health system would have been good to know early on when working on the CHT. I ran into issues while developing apps because I was associating CHW’s on the Health Facility level, however the team informed me that CHW’s typically operate in their own Area, not on the Health Facility level. I’m still in the process of switching my instance around to better reflect this, and having CHW’s on an Area level instead of Health Facility level has made my tasks/targets behave slightly differently. Perhaps having more documentation on how to set up a test dataset and why things are set up the way they are would be helpful (I know there is a way to import test data into a local instance at the bottom of this page (Link 1), but having more instructions as to why things are where they are, as well as including CHW’s in this setup would be useful).

referenced documentation: https://github.com/medic/cht-core/blob/master/INSTALL.md

[helizabetholsen]

This is something @ecsalomon has been talking about from a data science perspective. This might be a good component of documentation for data science - or at least input from R&L teammates on how this resource could be used!