Consider adding more context for citation formatting

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> One comment re: wording [for citation guidance] to perhaps consider: That we generally want to ask people to cite both software _and_ paper (if there is a paper) is an institutional practice we chose. But prioritizing the paper citation can also be a choice, which can result in actually _wanting_ the paper citation to show up on the sidebar on GitHub (and perhaps including the code citation BibTeX in the README instead).
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> I don't have a good suggestion for how to convey this being a choice when instantiating the template, and of course there are a variety of reasons why code as a first-class citizen in citation networks should be promoted. So maybe this is best deferred to considering at a later time.
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> _Originally posted by @hlapp in https://github.com/Imageomics/Collaborative-distributed-science-guide/pull/69#pullrequestreview-4189999222_

We may consider including more context in a collapsible box/admonition for those interested in deciding between the two options. The preferred option is still to have a code citation and ask for paper citation in the README.

Inizia individuando nella guida le indicazioni sulle citazioni e il relativo modello, quindi leggi il testo circostante e le eventuali convenzioni esistenti per admonition o riquadri espandibili. Il lavoro è completato quando viene aggiunto il contesto per scegliere tra citazioni del codice e del paper, mantenendo la preferenza indicata per una citazione del codice e richiedendo la citazione del paper nel README.

Scritto dal modello di indicizzazione a partire dal testo della issue.