Add citation row to metadata table

[simongray]

Ask Lorenzo for more.

[simongray]

I guess a bib-reference component could be added to the shared ns. This function would then used to generate both the citations in the bibliography lists as well as in the document metadata.

One possible improvement to the current situation is the addition of :hover effects to outline the individual parts of the citation better.

Another improvement could be adding the classic BibText, however I'm unsure whether the data is currently decomposed enough for this to be possible. Probably not.

[simongray]

So this seems to be primarily about generating citation references for each of the TEI document URLs. Dorte says that she would prefer them to be in the format used in CLARIN DSPACE, while I think including bibtex is ideal.

Perhaps some kind of bibtext parsing could even be employed?