docs: add superpowers and frontend-design cross-domain plugins to Companion Tools

review: audit and fix all 6 skills via /review-skill

style: convert markdown files to Obsidian format

docs: add documentation layer (PRIMER, MEMORY, LESSONS, DESIGN, CHANGELOG)

retrofit: apply MWP structure overlay

fix: rename scaffold to scaffold-template to avoid name collision

fix: make all skills visible for orchestrator discovery

fix: remove unsupported allowed-tools from skill frontmatter

docs: add multi-repo CDN sync guidance + plugin rename to gtm-template-builder-plugin

docs: add critical tagging & deployment rules to CLAUDE.md template

docs: add try/catch/finally to sandbox constraints

docs: add jsDelivr CDN hosting rules — one product per repo

Update docs to use major version alias (@1) in CDN URL examples

Update plugin with GTM template UI/UX and API learnings

Add README with installation instructions and skill reference