docs: French translations - upgrade April 2025

[joachimjusth]

Align the translations, add the missing files/elements.

Closes #

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• I have followed every step in the contributing guide (updated 2022-10-06).
• The PR title follows the convention we established conventional-commit
• I performed a functional test on my final commit

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Changelog

Align the French translations with the new content from the original documentation.

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Name	Status	Preview	Comments	Updated (UTC)
create-t3-app	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Apr 15, 2025 3:23am

[github-actions]

Hey t3-oss/translators!

This PR contains changes to your language. Please review the changes ❤️.

FR: @Defranos, @joachimjusth, @vdeva