add french (fr-FR) translation

[Starland9]

Feat: Add fr-FR translation and audioop-lts dependency

Description:

This pull request introduces two main changes:

1. Added French (fr-FR) translations:

   • A new fr-FR.json file has been added to backend/chainlit/translations/ to provide French language support for the user interface. This improves the user experience for French-speaking users.

2. Added audioop-lts dependency:

   • The audioop-lts package has been added to backend/pyproject.toml. This is a long-term support version of the audioop module, which is necessary for compatibility with Python 3.13 and beyond, as the original audioop module is being removed.

These changes enhance the internationalization of the application and ensure future compatibility with upcoming Python versions.

Failing CI

[hayescode]

@Starland9 please fix CI

[Starland9]

Ok. I put the correct version code. Sorry, I forgot to do it before pushing.

[hayescode]

@Starland9 since you added the audioop-lts you'll need to run poetry lock and push the updated lock file.

[asvishnyakov]

@Starland9 Can you explain why we need directly depend in this and how it related to translations? I don't see any direct usage of it in Chainlit source code @hayescode We already have it in dependencies via discord package, which belongs to tests dependencies group

[hayescode]

These 2 things are totally unrelated. Should be separate PRs but it's such a small change I'll allow it this time

[hayescode]

@Starland9 update the poetry.lock file to pass the CI

[hayescode]

@Starland9 i added audioop-lts to main and updated the poetry lock, so this PR will only be for the FR translation.