revert to js action

esbuild.config.js

@@ -0,0 +1,24 @@
+import { build } from "esbuild";
+
+// Build the GitHub Action bundle only
+// For npm package builds, use zshy (pnpm build:npm)
+await build({
+  entryPoints: ["./entry.build.ts"],
+  bundle: true,
+  outfile: "./entry.cjs",
+  format: "cjs",
+  platform: "node",
+  target: "node20",
+  minify: true,
+  sourcemap: false,
+  // @actions/core is provided by GitHub Actions runtime, but we still need it bundled
+  // for local testing. However, we can mark it to reduce duplication if needed.
+  external: [],
+  // Enable tree-shaking to remove unused code
+  treeShaking: true,
+  // Drop console statements in production (but keep for debugging)
+  drop: [],
+});
+
+console.log("✅ Build completed successfully!");
+