Enable users to switch seamlessly between English and Arabic languages

Adds i18next, LanguageDetector, locales (en.json, ar.json), and LanguageSwitcher component for internationalization.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: ff0be73b-afdd-4747-978b-bb8301fb0a82
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/9777c70b-fc38-4831-8d6b-78dfffe041b0/d552135c-0e60-4fc7-98a2-0e9cddf2b4b3.jpg

package.json

@@ -55,6 +55,9 @@
     "express": "^4.21.2",
     "express-session": "^1.18.1",
     "framer-motion": "^11.13.1",
+    "i18next": "^25.2.1",
+    "i18next-browser-languagedetector": "^8.1.0",
+    "i18next-http-backend": "^3.0.2",
     "input-otp": "^1.4.2",
     "lucide-react": "^0.453.0",
     "memorystore": "^1.6.7",
@@ -68,6 +71,7 @@
     "react-day-picker": "^8.10.1",
     "react-dom": "^18.3.1",
     "react-hook-form": "^7.55.0",
+    "react-i18next": "^15.5.2",
     "react-icons": "^5.4.0",
     "react-resizable-panels": "^2.1.7",
     "recharts": "^2.15.2",