Importing a PDF with arXiv Id should fetch the arXiV information using the arXivFetcher

[koppor]

Example paper: https://arxiv.org/abs/2408.06224

Similar to doi = getDoi(null); and related code in org.jabref.logic.importer.fileformat.PdfContentImporter, there should be a handling of the àrXiv` id.

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Tasks:

1. Add test case to org.jabref.logic.importer.fileformat.PdfContentImporterTest
2. Implement functionality in org.jabref.logic.importer.fileformat.PdfContentImporter (and maybe also the classes for the arXiv Id parsing)

[XYZ567AB]

Hi, Koppor! I am really interested in this issue. Could you let my work out this issue? Thank you!

[github-actions]

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