✨ Docs 📚 Add bibliography support

[jmaupetit]

Purpose

Most researchers and students need to integrate a bibliography in their writings. It has been reported that it's a must-have for them to use Docs 😉

References used to generate the bibliography should be integrated in the document content flow using a dedicated Markdown syntax, e.g.:

[…] it has been reported in @foo_2025 that […]

And the corresponding Bibliography section block must then be automatically updated (it cannot be directly edited, similarly to the document outline).

## Bibliography

Foo et al, "Pluto is not a dog.", _Mickey Journal_, vol 44 (2), pp 245-54, 2025.

Proposal

Front-end

1. Add a custom inline-content type to insert a reference — using a DOI (or a bibtex-like citation key).
2. Add a custom block to insert the rendered bibliography (an ordered collection of references rendered in a selected style) and eventually upload a bibtex document attachment.

Back-end

In a first approach:

1. Add per-document reference collection support: store references as an attached bibtex file (when the bibliography block is added)

A more flexible (future) approach would be to:

1. Add full references collection support on a per-user/account basis,in a dedicated (external?) application,
2. Synchronize collections with third-party services such as HAL, ORCID or even Zotero (or alike).