French translation

[delahondes]

Description

Added French translation

How Has This Been Tested?

Tested in admin and in integration in a private app.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• I have run the make format command to format my code
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• I have added my name and/or github handle to AUTHORS.rst
• I have added my change to CHANGES.rst
• All new and existing tests passed.

[delahondes]

I forgot to say thanks for maintaining this project, which just fit very nicely for my app. As I use it more, I realize that some of my translation are not optimal yet. I am unsure how to enhance my pull request, sorry about that.

[rossmechanic]

Thanks