in the end, I want DOI and URL in the references to linebreak in an orderly fashion when producing pdf from markdown. For the package `xurl` to function I need the doi or url part to be in `\url` not in `\href` or in `\href` with `\nolinkurl` (to my understanding).
Can I give `citeproc` an option for giving me all url or doi as `\url`?