Create author list dynamically in docs

[endast]

What

This PR updates the doc build process so that we add the authors to the doc automatically from the citations.cff file, so we don't have to update them i 3 separate places.

Testing

To test this pr you can first build the docs and look at the author list in the docs:

make html && open _build/html/index.html

Then try adding a new author to the citations.cff example:

...
  - given-names: Oliver
    family-names: Stegle
    orcid: 'https://orcid.org/0000-0002-8818-7193'
  - given-names: John
    family-names: Doe
    orcid: 'https://orcid.org/0000-0002-8818-7193'

Build the docs again
make html && open _build/html/index.html

The docs should now contain the new author:

Note:
This will add new authors to the docs that were not present in the docs (but exist in the citations.cff).

Before:
© Copyright 2024, Clarke, B., Holtkamp, E., Öztürk, H., Mück, M., Wahlberg, M., Meyer, K., Brechtmann, F., Hölzlwimmer, F. R., Gagneur, J., & Stegle, O

After:

© Copyright 2024, Clarke, B., Holtkamp, E., Öztürk, H., Mück, M., Wahlberg, M., Meyer, K., Munzlinger, F., Brechtmann, F., Hölzlwimmer, F., Gagneur, J., Stegle, O..

[Marcel-Mueck]

Looks good