Write .npmrc with auth token before publishing — NODE_AUTH_TOKEN alone
is not picked up by npm without a registry-scoped config entry.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Add files field, author, repository, and engines to package.json. Add
.npmignore, MIT LICENSE file, GitHub Actions publish workflow on v* tags,
and update README install section with bun install -g / bunx instructions.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>