fix: use .cjs extension for bin script to fix ES module compatibility

The package.json has "type": "module" but bin/hapi.js uses CommonJS
require() syntax. Renaming to .cjs forces Node.js to treat it as
CommonJS regardless of the package type setting.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

cli/package.json

@@ -13,10 +13,10 @@
     "directory": "cli"
   },
   "bin": {
-    "hapi": "bin/hapi.js"
+    "hapi": "bin/hapi.cjs"
   },
   "files": [
-    "bin/hapi.js"
+    "bin/hapi.cjs"
   ],
   "imports": {
     "#embedded-assets": {