Add comprehensive French translation glossary document to standardize key project terminology. The glossary includes translations for core concepts, model-related terms, user management, recharge & redemption, channel management, and security terms. This ensures consistency and accuracy in French translations across the project, with specific guidance on technical terms and contextual usage.
- Added `common.changeLanguage` key to `en.json`, `fr.json`, and `zh.json`.
- Updated `LanguageSelector.jsx` to use the new shared key.
- Completed `fr.json` with all keys from `en.json` and `zh.json`.
- Added translations for `closeSidebar`, `pricing`, and `language`.
- Création du fichier de traduction `fr.json` en se basant sur `en.json`.
- Mise à jour de la configuration i18n pour inclure la langue française.
- Modification du sélecteur de langue pour afficher l'option "Français" avec le drapeau correspondant.