Add test coverage checklist, report template, and stack matrix for ecommerce project

- Created a test coverage checklist to ensure comprehensive testing of backend and frontend components.
- Added a test report template to standardize reporting on test execution results and gaps.
- Introduced a test stack matrix to guide the selection of testing tools and frameworks for backend and frontend.
- Established a skill for repairing failing tests, including a failure triage checklist and a test repair template.
- Documented recommended MCP stack for ecommerce development with FastAPI and React/Next.js.
- Developed a detailed README outlining the project structure, agent capabilities, and recommended workflows.
- Compiled a comprehensive workflow guide detailing step-by-step commands for project setup, testing, and SEO implementation.

site-fullstack/.github/skills/ecommerce-seo-review/assets/seo-review-checklist.md

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+# SEO Review Checklist
+
+## Metadata
+- Titles are unique on strategic page types.
+- Meta descriptions are present where useful and not duplicated at scale.
+- Open Graph and social metadata are present for key public pages.
+
+## Crawl and indexation
+- Canonicals exist where duplication risk is real.
+- Noindex is applied to low-value routes such as cart, account, internal search, and thin utility pages when appropriate.
+- Filter, sort, and pagination behavior aligns with the SEO plan.
+- Sitemap generation excludes noindex and low-value URLs.
+- robots.txt does not accidentally block important content.
+
+## Structured data
+- JSON-LD exists where intended.
+- Schema matches visible content.
+- Product, offer, breadcrumb, article, FAQ, and organization schema are used correctly.
+- There are no fake reviews, misleading offers, or invalid structured data assumptions.
+
+## Page templates
+- Category and collection templates support unique SEO fields and meaningful content.
+- Product templates support strong metadata, support content, and structured data.
+- Brand and editorial pages have distinct intent and do not cannibalize key landing pages.
+
+## Internal linking
+- Breadcrumbs exist where expected.
+- Important categories are linked from strong pages.
+- Product and editorial pages support relevant internal links.
+- Strategic landing pages are not orphaned.
+
+## Performance-sensitive SEO
+- Key pages are not overloaded with client-only SEO logic.
+- There are obvious protections against large layout shifts and heavy above-the-fold payloads.
+- Media and fonts do not create avoidable search-quality regressions.
+
+## Unknowns to flag
+- Runtime rendering behavior.
+- Search Console or analytics data not visible in code.
+- Production-only redirects, robots headers, CDN behavior, and sitemap deployment details.