Add Author Role to Publications

[tadean]

Motivation

The CSL Schema allows for the notion that contributors may have a specific role in a publication, such as editor, translator, etc. We should add the ability for selecting a role for the contributor when attaching them to the publication

Is your feature request related to a problem? Please describe.

Users need to be able to indicate an contributors role in the publication, for styles that allow for that.

Proposed Resolution

field_az_authors should be updated to allow a role to be chosen when selecting the author. This should take the form that the role is in the context of the reference, not the author - i.e. an author should be able to have different roles in different publications. This will likely mean a subclass of the inline entity form that allows for a reference to an entity (the author) and a role (a config entity)

Describe alternatives you've considered

Not having roles selectable. This would make citations for styles where translators, editors, etc are listed incorrectly.

[trackleft]

We also need the illustrator role for books where the same person can be both author and illustrator.

[trackleft]

Would also likely need to follow this issue for allowing the same entity to be referenced more than once from a parent.
https://www.drupal.org/project/inline_entity_form/issues/3363988

[tadean]

I agree - I'd been wondering about that too. Thanks!