Add pnpm bench

Author: NullVoxPopuli

package.json

@@ -41,6 +41,7 @@
     "url": "git+https://github.com/emberjs/ember.js.git"
   },
   "scripts": {
+    "bench": "node ./bin/benchmark.mjs",
     "build:js": "rollup --config",
     "build:types": "node types/publish.mjs",
     "build": "npm-run-all build:*",
@@ -386,4 +387,4 @@
     }
   },
   "packageManager": "pnpm@10.5.0"
-}
+}