Add zip (#3075)

# Description of Changes

- Made a recursive function that checks if a file is a zip, then scans
its contents. If the content is a zip, or an accepted file type
(non-folder, size > 0), add it and repeat the check for zips
- Change all convert fragment to accept application/zip
- Slightly modified the input file styling to include an ID for
appending the "Extracting" text
- Added language translation for the "Extracting..." text
- (Edit March 3) Removed recursive function, zip file inside target zip
file is excluded
- For decrypt function after uploading the file, i reused one webworker
to handle the decryption , since in the previous code the workers are
created but not detroyed for every single file, this caused a huge slow
down for uploading large files due to creation of threads and thus this
proposal.

- Closes #2951 

---

### General

- [ ✅] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [✅ ] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/DeveloperGuide.md)
(if applicable)
- [✅ ] I have performed a self-review of my own code
- [✅ ] My changes generate no new warnings

### UI Changes (if applicable)


![image](https://github.com/user-attachments/assets/ee4c6dc8-8740-45c9-8772-05fa7444ca6d)
Added extracting text (for all language).

### Testing (if applicable)

- [ ✅] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/DeveloperGuide.md#6-testing)
for more details.

---------

Co-authored-by: Ludy <[email protected]>
Co-authored-by: reecebrowne <[email protected]>
Co-authored-by: Reece Browne <[email protected]>
Co-authored-by: Anthony Stirling <[email protected]>
Co-authored-by: swanemar <[email protected]>
Co-authored-by: stirlingbot[bot] <195170888+stirlingbot[bot]@users.noreply.github.com>

src/main/resources/messages_fr_FR.properties

@@ -1329,6 +1329,7 @@ fileChooser.dragAndDrop=Glisser & Déposer
 fileChooser.dragAndDropPDF=Drag & Drop PDF file
 fileChooser.dragAndDropImage=Drag & Drop Image file
 fileChooser.hoveredDragAndDrop=Glisser & Déposer le(s) fichier(s) ici
+fileChooser.extractPDF=Extraction en cours...
 
 #release notes
 releases.footer=Versions