feat(conductor): add track manager command for lifecycle management

Add /conductor:manage command with comprehensive track lifecycle operations:
- Archive completed tracks with reason tracking
- Restore archived tracks to active state
- Delete tracks permanently with safety confirmations
- Rename track IDs with full reference updates
- Cleanup orphaned artifacts and stale tracks
- Interactive menu when invoked without arguments

Also includes:
- Add Archived Tracks section to tracks.md template
- Update README with manage command documentation
- Bump version to 1.1.0
- Format files with prettier

plugins/conductor/.claude-plugin/plugin.json

@@ -1,5 +1,6 @@
 {
   "name": "conductor",
+  "version": "1.1.0",
   "description": "Context-Driven Development plugin that transforms Claude Code into a project management tool with structured workflow: Context → Spec & Plan → Implement",
   "author": {
     "name": "Seth Hobson",