Establishes the FabledRulebook-required ignore patterns (docs/superpowers/specs,
docs/superpowers/plans) plus Python/Node/Vite/extension/volumes/IDE rules from
spec §6.1 before any other code lands, so accidental adds can't leak. Also
ignores .claude/settings.local.json (per-user local overrides; shared
.claude/settings.json may be committed in the future).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
