[OO] Allow slashes in citation keys for reference marks

[subhramit]

Follow-up to #12474

To accommodate the following auto-generated default citation key from the bibtex entry mentioned in #12930 (comment):

@Online{,
  author = {{The PGF/TikZ Team}},
  date   = {2023-01-16},
  title  = {pgf – Create PostScript and PDF graphics in TeX},
  url    = {https://ctan.org/pkg/pgf},
}

[contains forward slashes("/")]

Earlier behavior: The key would not be parsed properly as it was not flexible enough to allow slashes. After citation, on trying to generate bibliography, following dialog was observed:

And then the exception:

Mandatory checks

• I own the copyright of the code submitted and I license it under the MIT license
• Change in CHANGELOG.md described in a way that is understandable for the average user (if change is visible to the user)
• Tests created for changes (if applicable)
• Manually tested changed features in running JabRef (always required)
• Screenshots added in PR description (if change is visible to the user)
• Checked developer's documentation: Is the information available and up to date? If not, I outlined it in this pull request.
• Checked documentation: Is the information available and up to date? If not, I created an issue at https://github.com/JabRef/user-documentation/issues or, even better, I submitted a pull request to the documentation repository.

[trag-bot]

@trag-bot didn't find any issues in the code! ✅✨

[calixtus]

I tried to find some documentation on what characters are allowed in the citation key, but unfortunately i dont see that the biblatex doc provides any information about that.

[Siedlerchr]

Backslash is used for escaping. I think the key field is treated like the other fields as well regarding the characters

[subhramit]

Backslash is used for escaping. I think the key field is treated like the other fields as well regarding the characters

This one is a forward slash

[subhramit]

May need a third opinion to finalize this.
@koppor are you aware if slashes are allowed/disallowed in citation keys?
At least JabRef does not complain (and in fact, auto generates if needed) - so I thought LibreOffice should not complain as well.

[koppor]

May need a third opinion to finalize this.
@koppor are you aware if slashes are allowed/disallowed in citation keys?

I bet they are allowed. I need to try out with a minimal .tex and .bib file. - This file should be committed to the repo. Nearby the IEEE.tex. (I'm on mobile writing a quick answer. As soon as I am on the PC, I can craft such files and tests)

[subhramit]

I bet they are allowed. I need to try out with a minimal .tex and .bib file. - This file should be committed to the repo. Nearby the IEEE.tex. (I'm on mobile writing a quick answer. As soon as I am on the PC, I can craft such files and tests)

I tried generating some using Claude. You can merge the commit and test when convenient.
#12971

[koppor]

I will create a new repository with.tex and .bib files with a separate CI Pipeline.

[koppor]

Cant test the next days

[koppor]

Future work: use logic of jabref logic for making valid citation keys maybe?