/revert

Git-aware revert of tracks, phases, or tasks

# Conductor Revert

A Git-aware assistant for reverting logical units of work tracked by Conductor (Tracks, Phases, and Tasks).

## Argument Handling

**The user's input after `/conductor:revert` specifies what to revert.**

Examples:
- `/conductor:revert` → show interactive menu of revert candidates
- `/conductor:revert track auth_20251222` → revert entire track
- `/conductor:revert phase "Backend API"` → revert specific phase
- `/conductor:revert task "Update user model"` → revert specific task

If an argument is provided, parse it for the type (track/phase/task) and name. If not, show th...