Add status to LibreSign document at app Files

[Extarys]

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Is your feature request related to a problem? Please describe. I created a test PDF Test signature.pdf for the admin to sign, once signed, a new file Test signature.signed.pdf was created. But now I have two files: Test signature.pdf and Test signature.signed.pdf and both shows LibreSign panel on the right saying the admin signed it.

If I removed the "signed" from the name, there is no way to show which document was signed precisely. Yes I can check the file size, but I should not have to.

Describe the solution you'd like

• Show something near the file icon to show that this file contains a digital signature from Libresign (this might be nextcloud upstream to show that the file contain a digital signature ?)
• Update the sidebar
  • For the original document: Show who requested the signature of that document and if/when it was signed
  • For the signed document: Show the digital signature/metadata of that file + what's above (For the original document) Clearly state that this document is the one containing a signature.

It would also be nice to have more instructions like : once signed, the original document can be safely deleted if not needed. Also, a text for the modal when we can create signature boxes to explain how it works (or a ? icon). I didn't know and found out while looking at issues here.

Describe alternatives you've considered A clear and concise description of any alternative solutions or features you've considered.

Additional context Add any other context or screenshots about the feature request here.