Rewrites the Shop personal-shopping-assistant skill to use the
@shopify/shop-cli (with a full direct-API fallback in references/),
replacing the previous curl-only shop-app skill.
- Rename optional-skills/productivity/shop-app -> shop
- Add references/: catalog-mcp.md, direct-api.md, safety.md, legal.md
- Catalog discovery via Shopify Global Catalog MCP (search / lookup /
get-product), device-authorization sign-in, UCP agent checkout with
delegated spending budget, and order tracking / returns / reorder
- One-product-per-message presentation rules + per-channel overrides
- Expanded security, safety, and legal guidance
Website docs are auto-generated from SKILL.md by CI
(website/scripts/generate-skill-docs.py), so no docs are hand-edited here.
