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-implementation/assets/technical-execution-map.md

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+# Technical Execution Map
+
+## Metadata layer
+- Define where titles, descriptions, canonicals, Open Graph, and robots directives are generated.
+- Prefer centralized page-type SEO configuration over scattered hardcoded tags.
+
+## Routing and index control
+- Ensure low-value routes can emit noindex or canonical rules.
+- Align filtered routes, sorted routes, search routes, and pagination with the SEO policy.
+
+## Structured data layer
+- Use JSON-LD generated from real page data.
+- Keep schema close to the page data source to reduce drift.
+
+## Sitemap and robots
+- Generate sitemaps only for valuable indexable URLs.
+- Exclude duplicates, noindex pages, and thin utility pages.
+
+## Internal linking systems
+- Breadcrumbs, related content blocks, category cross-links, product recommendations, and editorial links should be intentional and reusable.
+
+## Performance-sensitive work
+- Protect LCP, INP, and CLS while adding SEO features.
+- Avoid heavy client-only SEO logic for key landing pages.
+
+## Validation
+- Check for duplicate titles or duplicate canonicals.
+- Check that schema matches visible content.
+- Check that robots and sitemap policy are coherent.