feat: add citeAs / citeWith properties

[alee]

update example in codemeta-software.json to demonstrate usage as well as property descriptions

proposed semantics:

• citeAs: permanent identifier URL resolving to a landing page / specific version of this software (primary reference for this software)
• citeWith: List of permanent identifiers for companion works that the author(s) also want to be cited with this software (e.g., conceptual paper introducing the software, methods publications describing the algorithms or implementation)
• referencePublication: permanent identifier to the "conceptual publication" about the software
• citation: general related references and other citations as free Text (should deprecate?)

resolves codemeta#408
resolves codemeta#268
resolves codemeta#381

[dgarijo]

Then we don't use creditText? This is a schema.org property that was proposed in the discussion, no?
Overall, I like the difference, but citeAs and reference publication are perhaps too close in meaning. We need better examples.

[alee]

I think creditText as Text is the dealbreaker for me. Seems to be more of a displayable caption for creative works (photographs, music, videos, etc.). I'd prefer a PID that resolves to a landing page and exact version of the software.

citeWith should be a comprehensive list of all publications that the author requests to be cited in addition to the citeAs ref

referencePublication does overlap with citeWith but I interpret it as the initial concept paper about the software

[dgarijo]

I will continue the discussion in the original discussion thread: codemeta#408 (comment)

I feel like we don't yet have sufficient agreement on this, since what you have proposed is different from what Rebecca had proposed, or even what I had proposed. I like the direction, but we need agreement before merging.