Guidelines for tool developers (Objective B)

[cthoyt]

We want to accumulate guidelines for people who are making mapping tools. These will go side-by-side with recommendations for mapping tools themselves.

These live in:

https://github.com/nfdi-de/section-metadata-wg-onto/tree/main/recommendations/B_Mapping_Standards/tools#recommendations-if-youre-developing-a-mapping-tool