Changelog commands

These commands are associated with product release documentation.

• changelog add - Create a changelog file
• changelog bundle - Create a changelog bundle file
• changelog gh-release - Create changelogs and a bundle from a GitHub release
• changelog init - Initialize changelog configuration and folder structure
• changelog bundle-amend - Add entries to an existing bundle
• changelog render - Generate markdown output from changelog bundle files
• changelog evaluate-pr - (CI) Evaluate a PR for changelog generation eligibility
• changelog prepare-artifact - (CI) Package changelog artifact for cross-workflow transfer
• changelog evaluate-artifact - (CI) Evaluate downloaded artifact in commit workflow