chore(package): pnpm install, adds packageManager field

Author: Jonas Jensen

package.json

@@ -9,5 +9,6 @@
     "vite": "^6.0.3",
     "vite-plugin-dts": "^4.3.0",
     "vitest": "^2.1.8"
-  }
+  },
+  "packageManager": "pnpm@9.15.5+sha512.845196026aab1cc3f098a0474b64dfbab2afe7a1b4e91dd86895d8e4aa32a7a6d03049e2d0ad770bbe4de023a7122fb68c1a1d6e0d033c7076085f9d5d4800d4"
 }