Better eslint/graphql rules for unused fields (#6444)

Author: lkostrowski

eslint.config.mjs

@@ -338,6 +338,9 @@ export default tseslint.config(
       "@graphql-eslint/no-anonymous-operations": "error",
       "@graphql-eslint/no-duplicate-fields": "error",
       "@graphql-eslint/no-deprecated": "warn",
+      "@graphql-eslint/no-unused-fragments": "warn",
+      "@graphql-eslint/no-unused-variables": "warn",
+      "@graphql-eslint/no-unused-fields": "warn",
     },
   }, // Disable any rules that conflict with Prettier
   prettierConfig,