API documentation needs

[volkerblum]

In the HybriD3 documentation, we should document the API in three separate points:

1. Point out that HybriD3 is historically optimized for in-browser usage and therefore no completely high-powered API but please work with us for specific needs

2. Working hands-on examples for different uses of the API -> Xiaochen example of two properties in same query, what else?

3. Point to MatD3 software documentation for origin of API and more systematic documentation in terms of writeup and code.

[volkerblum]

Example query from Xiaochen:

https://materials.hybrid3.duke.edu/materials/datasets/summary/?primary_property__name=photoluminescence&secondary_property__name=energy