feat: Add possibility to embed XML files and other files within the PDF

[StevenRenaux]

Related to :

https://github.com/gotenberg/gotenberg/releases/tag/v8.25.0

Available on the Chromium, LibreOffice

[Jean-Beru]

Note

Endpoints:

• https://gotenberg.dev/docs/routes#embeds-chromium
• https://gotenberg.dev/docs/routes#embeds-libreoffice
• https://gotenberg.dev/docs/routes#merge-pdfs-route
• https://gotenberg.dev/docs/routes#split-pdfs-route

"Download from" new value:

• https://gotenberg.dev/docs/routes#download-from

New route

• https://gotenberg.dev/docs/routes#embed-files-route