Create first version of a mapping widget

[jusa3]

To start working on Milestone M5.2 (Terminology mappings are integrated to the TSS) a first version of a simple mapping details widget should be implemented.

Requirements:

• Show available mappings for an entity

Endpoints:
https://coli-conc.gbv.de/api/mappings
https://coli-conc.gbv.de/api/data

Related issue

Use the OXO2 prototype?

[nichtich]

Related work at coli-conc (VueJS instead of React):

1. https://coli-conc.gbv.de/data/?uri=https://coli-conc.gbv.de/api/mappings/761fe565-3815-4c14-b277-4fc980639ced - show details of a mapping
2. https://coli-conc.gbv.de/coli-rich/app/?ppn=389598534 - an application that also queries mappings and shows lists of mappings
3. https://gbv.github.io/jskos-vue/ - does not have mapping widgets (discussed at Do we need any components related to mappings? gbv/jskos-vue#6)

[jusa3]

Examples from OXO2:

https://github.com/EBISPOT/oxo2/blob/dev/oxo2-frontend/src/components/mapping/MappingItem.tsx

[rombaum]

There is another impression how the mapping justification could be visualized. I also asked @matentzn if there is an example with multiple values for mapping justifications

[matentzn]

No, there cannot be multiple values for mapping_justification: https://mapping-commons.github.io/sssom/Mapping/

This used to be possible, but we have elevated that element as a centerpiece of the SSSOM data model, and made it unique.