增加js-runner的skill

skills/js-runner/scripts/get_temp_path.js

@@ -0,0 +1,14 @@
+import { tmpdir } from "os";
+import { join } from "path";
+
+export function getTempPath(extension) {
+  const timestamp = Date.now();
+  const random = Math.random().toString(36).substring(7);
+  return join(tmpdir(), `js-runner-${timestamp}-${random}.${extension}`);
+}
+
+// CLI interface: accepts extension as first argument
+if (import.meta.main) {
+  const extension = process.argv[2] || "js";
+  console.log(getTempPath(extension));
+}