Adding the missing translations in French (#2563)

# Description

I have added the missing tags for the French translation

Closes #2315 

## Checklist

- [x] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [x] I have performed a self-review of my own code
- [ ] I have attached images of the change if it is UI based
- [ ] I have commented my code, particularly in hard-to-understand areas
- [ ] If my code has heavily changed functionality I have updated
relevant docs on [Stirling-PDFs doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
- [ ] My changes generate no new warnings
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

src/main/resources/messages_fr_FR.properties

@@ -1281,49 +1281,49 @@ splitByChapters.desc.4=Autoriser les Doublons : Si coché, permet à plusieurs s
 splitByChapters.submit=Diviser le PDF
 
 #File Chooser
-fileChooser.click=Click
-fileChooser.or=or
-fileChooser.dragAndDrop=Drag & Drop
-fileChooser.hoveredDragAndDrop=Drag & Drop file(s) here
+fileChooser.click=Cliquez
+fileChooser.or=ou
+fileChooser.dragAndDrop=Glisser & Déposer
+fileChooser.hoveredDragAndDrop=Glisser & Déposer le(s) fichier(s) ici
 
 #release notes
-releases.footer=Releases
-releases.title=Release Notes
-releases.header=Release Notes
-releases.current.version=Current Release
-releases.note=Release notes are only available in English
+releases.footer=Versions
+releases.title=Notes de version
+releases.header=Notes de version
+releases.current.version=Version actuelle
+releases.note=Les notes de version sont uniquement disponibles en anglais
 
 #Validate Signature
-validateSignature.title=Validate PDF Signatures
-validateSignature.header=Validate Digital Signatures
-validateSignature.selectPDF=Select signed PDF file
-validateSignature.submit=Validate Signatures
-validateSignature.results=Validation Results
-validateSignature.status=Status
-validateSignature.signer=Signer
+validateSignature.title=Valider les signatures PDF
+validateSignature.header=Valider les signatures numériques
+validateSignature.selectPDF=Sélectionnez un fichier PDF signé
+validateSignature.submit=Valider les signatures
+validateSignature.results=Résultats de la validation
+validateSignature.status=Statut
+validateSignature.signer=Signataire
 validateSignature.date=Date
-validateSignature.reason=Reason
-validateSignature.location=Location
-validateSignature.noSignatures=No digital signatures found in this document
-validateSignature.status.valid=Valid
-validateSignature.status.invalid=Invalid
-validateSignature.chain.invalid=Certificate chain validation failed - cannot verify signer's identity
-validateSignature.trust.invalid=Certificate not in trust store - source cannot be verified
-validateSignature.cert.expired=Certificate has expired
-validateSignature.cert.revoked=Certificate has been revoked
-validateSignature.signature.info=Signature Information
+validateSignature.reason=Raison
+validateSignature.location=Localisation
+validateSignature.noSignatures=Aucune signature numérique trouvée dans ce document
+validateSignature.status.valid=Valide
+validateSignature.status.invalid=Invalide
+validateSignature.chain.invalid=La validation de la chaîne de certificats a échoué - impossible de vérifier l'identité du signataire
+validateSignature.trust.invalid=Le certificat n'est pas dans le magasin de confiance - la source ne peut pas être vérifiée
+validateSignature.cert.expired=Le certificat a expiré
+validateSignature.cert.revoked=Le certificat a été révoqué
+validateSignature.signature.info=Informations sur la signature
 validateSignature.signature=Signature
-validateSignature.signature.mathValid=Signature is mathematically valid BUT:
-validateSignature.selectCustomCert=Custom Certificate File X.509 (Optional)
-validateSignature.cert.info=Certificate Details
-validateSignature.cert.issuer=Issuer
-validateSignature.cert.subject=Subject
-validateSignature.cert.serialNumber=Serial Number
-validateSignature.cert.validFrom=Valid From
-validateSignature.cert.validUntil=Valid Until
-validateSignature.cert.algorithm=Algorithm
-validateSignature.cert.keySize=Key Size
+validateSignature.signature.mathValid=La signature est mathématiquement valide MAIS :
+validateSignature.selectCustomCert=Fichier de certificat personnalisé X.509 (Optionnel)
+validateSignature.cert.info=Détails du certificat
+validateSignature.cert.issuer=Émetteur
+validateSignature.cert.subject=Sujet
+validateSignature.cert.serialNumber=Numéro de série
+validateSignature.cert.validFrom=Valide à partir du
+validateSignature.cert.validUntil=Valide jusqu'au
+validateSignature.cert.algorithm=Algorithme
+validateSignature.cert.keySize=Taille de la clé
 validateSignature.cert.version=Version
-validateSignature.cert.keyUsage=Key Usage
-validateSignature.cert.selfSigned=Self-Signed
+validateSignature.cert.keyUsage=Usage de la clé
+validateSignature.cert.selfSigned=Auto-signé
 validateSignature.cert.bits=bits