"""
Command Line Interface for Universal Issue Tracking

Provides a comprehensive CLI for managing issues across different backends.
The CLI is designed to be intuitive and follows common patterns from
tools like git, gh (GitHub CLI), and similar utilities.

Commands:
- issue list: List issues
- issue show: Show issue details
- issue create: Create new issue
- issue edit: Edit existing issue
- issue close: Close issue
- issue reopen: Reopen issue
- issue comment: Add comment
- issue label: Manage labels
- issue assign: Manage assignments
- backend: Manage backends
- sync: Synchronization operations
"""