Repository: support reference to published articles w/o DOIs

[alainna]

Is your feature request related to a problem? Please describe.
As a preprints author using Janeway Repository, I expect to be able to link to the published article corresponding to my preprint, even if it doesn't have a DOI.

Describe the solution you'd like
The "Published version" URL linked to a Repository object should be able to be a DOI or a URL. Submitting authors or Repository Managers should be able specify only one of either.

Perhaps this could be achieved by:

• allowing the "Published version" input value to be either a DOI or a URL; the Author/Manager should tick a box to
• having "Published version DOI" be the primary field displayed, and having an option to input the "Published version URL" once a box is ticked or radio field selected; the URL input could either refresh the displayed text around the "Published DOI" field, or it could display a new field (see below)

Expected public display:

Possible metadata edit/update input:

after ticking radio box

[StephDriver]

A11y thoughts

• the output will need to have a contextual link to the published version and use the new DOI and/or external link templates.
• I think the paragraph should to be a indifferent order, as currently "this" of the final sentence could be stating that the published version is based on version 4, or that the preprint currently displayed is version 4.