Fix: lint 오류 수정

Author: mungyun1

package-lock.json

@@ -20,7 +20,10 @@
     "@types/react-dom": "^18",
     "eslint": "^8",
     "eslint-config-next": "15.0.2",
+    "eslint-config-prettier": "^9.1.0",
+    "eslint-plugin-prettier": "^5.2.1",
     "postcss": "^8",
+    "prettier": "^3.3.3",
     "tailwindcss": "^3.4.1",
     "typescript": "^5"
   }