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/ceb/register.json

@@ -9,7 +9,9 @@
     "languages": {
       "en": "Iningles",
       "de": "Aleman",
-      "ceb": "Bisaya"
+      "ceb": "Bisaya",
+      "es": "Espanyol",
+      "fr": "Pranses"
     },
     "register": "Pagrehistro",
     "close": "Isira",