localsetup-skill-normalizer

Normalize skills already in the tree for Agent Skills spec compliance and platform-neutral wording. Use when the user wants to normalize one or more skills in _localsetup/skills/ (e.g. after import, or after copying files in), or when batch-reviewing previously imported skills. Applies _localsetup/docs/SKILL_NORMALIZATION.md; shows summary and key edits, then applies on approval.