fix(translations): FR - Reviewed and fixed all French labels

[LoganTann]

This PR fixes several issues with the French translations across the application, aiming to improve clarity, consistency, and overall quality.

The changes fall into a few main categories:

• Translation of all untranslated labels. Some labels and text that were previously only in English have now been translated.
• Avoiding common pitfalls of machine-level translations. E.g., Got it -> Je l'ai -> Compris
• Terminology improvements, mostly to align the UI text with typical French software conventions. E.g., hidden network -> Réseau caché -> Réseau masqué
• Typos and grammatical errors. E.g., Lanceur d'application -> Lanceur d'application*s*; Ils -> Elles (pronouns)
• Contextual Reworks / Rephrased Content. Rewrote several labels to sound more natural for French-speaking users and to be more intuitive or concise. E.g., (notez que les deux options sont nécessaires) -> (Les deux options sont requises)
  • This also includes labels edited for consistency with other labels across the entire application. E.g., Disposition en hauteur pour les moniteurs verticaux. -> Disposition en hauteur*, utile pour* les écrans verticaux.
  • I have also rewritten the descriptions of some plugins (e.g., BSPWM) to be more descriptive. I can propose my changes for the English version as well, if needed.

closes #706 #679

[LoganTann]

Fixed merge conflict due to 5dc081a

[LoganTann]

I recommend merging this PR after this one : #1188

[LoganTann]

@eythaann are there any plans to merge translations PR ?

Just to know if fixing merge conflicts gradually is worth the time, or if it's better to wait.