chore: set pnpm as package manager

Author: Belco90

package.json

@@ -97,6 +97,7 @@
 	},
 	"engines": {
 		"node": "^18.18.0 || ^20.9.0 || >=21.1.0",
-		"npm": ">=9.8.1"
-	}
+		"pnpm": "^9.14.0"
+	},
+	"packageManager": "pnpm@9.14.2"
 }