fix: build to .js for Sentry sourcemap upload

[BYK]

The Sentry esbuild plugin requires files with .js extension to properly inject debug IDs and upload source maps.

This changes the build process to:

1. Build to dist/craft.js first
2. Let the Sentry plugin inject debug IDs and upload source maps
3. Rename to dist/craft (the final executable)
4. Clean up any remaining source map files

[github-actions]

Semver Impact of This PR

🟢 Patch (bug fixes)

📋 Changelog Preview

This is how your changes will appear in the changelog.
Entries from this PR are highlighted with a left border (blockquote style).

---

This PR will not appear in the changelog.

---

_{🤖 This preview updates automatically when you update the PR.}