(web) service revision - renaming WebService(Version) to DigitalService(Version)

[lzehl]

Not all digital services are web services. I would like to bring them together.
Their exact type (e.g. "web service", "system service", etc) should be an annotation.

This would also pave the way towards other service types which need totally different schemas.
E.g. HumanService(Version) (e.g. Curation, etc) or HardwareService(Version) (e.g. service to a specific hardware, e.g. scanner, neuromorphic chip, etc) etc.

We need to discuss general service types (and which of them have joined or very similar metadata).

[lzehl]

discussion result with the dev team: renaming is a good idea. additional properties should clarify the exact type.

digital services are often used as synonym for virtual services
We rather mean technology-centered services vs human-centered services