Add Node.js support: replace Bun-specific APIs, bundle for Node

- Bun.argv → process.argv (standard Node API)
- Bun.sleep → setTimeout promise (standard)
- cli.ts shebang: #!/usr/bin/env bun → #!/usr/bin/env node
- Added bun build step: bundles to dist/index.js for Node
- cli.js entry point for Node users
- prepublishOnly runs build automatically
- Bump to v0.3.0

Works with both: bun run index.ts OR node dist/index.js

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: baixianger

VERSION

@@ -0,0 +1 @@
+0.2.2

cli.js

@@ -0,0 +1,2 @@
+#!/usr/bin/env node
+import "./dist/index.js";

cli.ts

@@ -1,2 +1,2 @@
-#!/usr/bin/env bun
+#!/usr/bin/env node
 import "./index.ts";