Adds the 'gt mq status <id>' command for displaying detailed merge request
information. Features:
- Shows all MR fields (branch, target, source_issue, worker, rig)
- Displays current status with timestamps and relative time
- Shows dependencies (what it's waiting on) with status icons
- Shows blockers (what's waiting on it)
- Supports JSON output with --json flag
This is part of the merge queue CLI commands (gt-svi).
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
