feat: add pdf display behind doc validation and an issue fixed

• There are 2 functions pdf_display: one for the display of the pdf behind the document validation and another one for the modification of titles
• close #1 (closed) : it's possible to completly remove a pdf when all documents
• some issues may appear (page number, etc)

added 7 commits

• b2b388fe...3c0421af - 6 commits from branch main
• 4a2e661f - Merge branch 'main' into 'urgent_updates'

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By Anthony AMMENDOLEA on 2023-06-04T14:34:04 (imported from GitLab)

added 1 commit

• ffeea8a0 - feat: conflicts and style

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By Anthony AMMENDOLEA on 2023-06-04T14:46:55 (imported from GitLab)

approved this merge request

By Anthony AMMENDOLEA on 2023-06-04T14:48:38 (imported from GitLab)

added 1 commit

• ce1713a6 - feat: issue of conflict

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By Anthony AMMENDOLEA on 2023-06-04T15:20:31 (imported from GitLab)

added 1 commit

• ab753636 - feat: use pdf name as doc_name

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By Bruno Lenzi on 2023-06-04T16:01:55 (imported from GitLab)