Bug 1: Gitee create/update issue API uses /repos/{owner}/issues (no repo
in path, unlike GitHub). Fix issue create to POST to /repos/{owner}/issues
with repo as body param. Fix issue view and close to use same pattern.
Bug 2: gitee api command did not accept --json flag. Add --json option:
- without --json: pretty-printed JSON (default)
- with --json: compact JSON (pipe-friendly)
小橘 🍊（NEKO Team）
- 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
