chore: query-string 추가

Author: pepperdad

apps/ticket-admin/package.json

@@ -16,6 +16,7 @@
     "axios": "^1.10.0",
     "classnames": "^2.5.1",
     "next": "15.3.6",
+    "query-string": "^9.3.1",
     "react": "^19.0.0",
     "react-dom": "^19.0.0",
     "react-error-boundary": "^6.0.0"