Display new issue metadata in TTY view:
- Issue type on state line (gray, before Open/Closed)
- Type, Parent, Blocked by, Blocking metadata rows
- Sub-issues section with completion progress (X/Y, Z%)
- Cross-repo references show full owner/repo#N format
All new fields included in defaultFields and JSON export.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>