feat(i18n): add French language support and enhance localization

- Introduced French as a supported language across the application, updating locale files and adding translations for various components.
- Enhanced language handling logic to accommodate French, ensuring proper detection and fallback mechanisms.
- Updated UI elements to include French language options, improving accessibility for French-speaking users.
- Refactored SEO handling to include French in hreflang links, enhancing search engine indexing for multilingual content.
- Added new scripts for managing French translations and ensuring consistency across language files.

frontend/src/i18n/locales/en/settings.json

@@ -58,7 +58,8 @@
                 "de": "German",
                 "en": "English",
                 "ceb": "Bisaya",
-                "es": "Spanish"
+                "es": "Spanish",
+                "fr": "French"
             },
             "eyecolor": {
                 "blue": "Blue",