The gt tap guard pr-workflow command was added in 37f465bde but the
PreToolUse hooks were never added to the embedded settings templates.
This caused polecats to be created without the PR-blocking hooks,
allowing PR #833 to slip through despite the overlays having the hooks.
Adds the pr-workflow guard hooks to both settings-autonomous.json and
settings-interactive.json templates to block:
- gh pr create
- git checkout -b (feature branches)
- git switch -c (feature branches)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>