feat: move i18next-cli to devDependencies

Relocated i18next-cli from dependencies to devDependencies as it's only needed for development tasks like translation management, not for runtime functionality.

web/package.json

@@ -17,7 +17,6 @@
     "history": "^5.3.0",
     "i18next": "^23.16.8",
     "i18next-browser-languagedetector": "^7.2.0",
-    "i18next-cli": "^1.10.3",
     "katex": "^0.16.22",
     "lucide-react": "^0.511.0",
     "marked": "^4.1.1",
@@ -86,7 +85,8 @@
     "prettier": "^3.0.0",
     "tailwindcss": "^3",
     "typescript": "4.4.2",
-    "vite": "^5.2.0"
+    "vite": "^5.2.0",
+    "i18next-cli": "^1.10.3"
   },
   "prettier": {
     "singleQuote": true,