French translation

[LoicRiegel]

Goal: create and maintain a french translation of Nushell's documentation

This is a very big effort, so if you are a native french speaker and you want to make Nu more user friendly, please join this issue and help with the translation.

How can you help?

• Translate documents from English to French
• Keep existing French documentation up to date after the English version changed
• Just review the translation: search for mistakes, suggest better phrasing...

[LoicRiegel]

I am currently adding the french translation to the project and translating just one or two documents on my fork. I'll make a PR soon, in the next few days