build(deps-dev): add eslint, peer dep of neostandard (#159)

Author: Fdawgs

package.json

@@ -37,6 +37,7 @@
     "@fastify/pre-commit": "^2.1.0",
     "@types/node": "^22.0.0",
     "c8": "^10.1.2",
+    "eslint": "^9.17.0",
     "fastify": "^5.0.0",
     "neostandard": "^0.12.0",
     "tsd": "^0.31.0"