feat: integrate i18next for internationalization support; add English and Chinese translations

package.json

@@ -35,11 +35,14 @@
     "clsx": "^2.1.1",
     "dotenv": "^16.3.1",
     "express": "^4.18.2",
+    "i18next": "^24.2.3",
+    "i18next-browser-languagedetector": "^8.0.4",
     "lucide-react": "^0.486.0",
     "next": "^15.2.4",
     "postcss": "^8.5.3",
     "react": "^19.1.0",
     "react-dom": "^19.1.0",
+    "react-i18next": "^15.4.1",
     "tailwind-merge": "^3.1.0",
     "tailwind-scrollbar-hide": "^2.0.0",
     "tailwindcss": "^4.0.17",