List open pull requests authored by you.

Usage: `hu gh prs`

Searches all repositories for open PRs where you are the author.

Output (table):
- CI status icon (✓ success, ✗ failure, ◐ pending, ○ unknown)
- PR title
- Link to PR

Related Commands:
- `hu gh failures` - Extract test failures from CI
- `hu gh fix` - Analyze failures and get fix context
- `hu gh runs` - List workflow runs
