- issue comments <number>: list all comments on an issue
- pr comment <number> --body: add a comment to a PR
- pr comments <number>: list all PR comments
- pr files <number>: list changed files with type and +/- stats
- pr diff <number>: show colorized diff (+ green, - red)
- pr review <number> --action: submit review (approve/request_changes/comment)
- pr review-comments <number>: list PR inline review comments
- README updated with new commands