URLBuilder missing readme() method #5
Description
URLBuilder has methods for package, versions, and documentation URLs, but nothing for README content.
Each registry has a different way to access READMEs:
- npm: jsdelivr CDN (
/npm/{name}@{version}/README.md) - crates.io: API endpoint (
/api/v1/crates/{name}/{version}/readme) - PyPI: project page (description is the readme)
- RubyGems/Packagist: registry web page
Without readme() on URLBuilder, consumers have to hardcode these per-ecosystem URLs themselves. Should be part of the standard URL surface alongside documentation().