Update list of software

[nichtich]

I've started to update the list of software. Cleanup is also needed to fully replace travis with GitHub actions. A comparison with the list of coli-conc repositories at GitHub shows the following repositories not listed as software:

data repositories

• https://github.com/gbv/jskos (is a specification and schema files)
• https://github.com/gbv/jskos-data, https://github.com/gbv/kos-registry, https://github.com/gbv/cocoda-mappings (data)

coli-rich

• https://github.com/gbv/kxpcci, https://github.com/gbv/coli-rich-scripts (should be merged into https://github.com/gbv/coli-rich)

other

• https://github.com/gbv/cocoda-workshop (demo)
• https://github.com/gbv/cocoda-locale-editor (application or library)
• https://github.com/gbv/jskos-vue (library)
• https://github.com/gbv/jskos-metrics (application or library)