Add installCLAUDETemplate() to Manager that:
- Reads templates/polecat-CLAUDE.md from rig root
- Substitutes {{rig}} and {{name}} with actual values
- Writes to polecats/<name>/CLAUDE.md
Called from both Add() and Recreate() after worktree creation.
Non-fatal if template is missing.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>