Add narrative to licence for publishing to repo

[nthieberger]

A user should be able to put their own conditions on an item that will be published to the repo. Those conditions should be visible in the repo icon view of the published item.

[r-tae]

This already exists to some extent but I see a couple of problems with our implementation just at a glance:

• the option that means "it is okay for people to see the data in the repository" is worded as "open access"; I have concerns that people may understand "open access" to mean "no restrictions; under creative commons"; It is clear in the repo UI that nothing is unconditionally open, since that wording is "Open (subject to agreeing to Nyingarn access conditions)" but the phrasing on the depositor side is not good
• I don't like that the review date says "After this date the item will become open access." I don't think this is actually true anyway, I would need to check the code
• You can't add an access narrative unless you choose 'restricted', which seems to also lock down to a list of authorised accounts; I believe we want a middle ground of making something available without approval while also having an access narrative. We should consider using something like TK labels