Have a French version of the tutorial

[alix-tz]

This is a big task

• figure the configuration requirements [might be expanded to more tasks]
  • https://docs.readthedocs.io/en/stable/faq.html#how-do-i-support-multiple-languages-of-documentation
• translate about.md
• translate administrators.md
• translate annotate.md
• translate api.md
• translate collaborate.md
• translate contribute.md
• translate export.md
• translate FAQ.md
• translate import.md
• translate index.md
• translate predict.md
• translate quick-start.md
• translate search.md
• translate segment.md
• translate shortcuts.md
• translate tags.md
• translate terminology.md
• translate train.md
• translate transcribe.md
• translate users.md
• translate virtual_keyboard.md
• translate walkthrough.md

[alix-tz]

This might require either switching to Sphinx as a page builder, instead of MkDocs, which has huge implications for the existing files; or find a work around with a separate repositories for each language.

I'll make some tests on the side to see how can be done.