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-code-review/assets/code-review-template.md

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+# CODE-REVIEW.md Template
+
+## 1. Review Scope
+- Reviewed repository or area
+- Config files inspected
+- Runtime and toolchain assumptions
+
+## 2. Executive Summary
+- Overall quality assessment
+- Highest-risk areas
+- Biggest maintainability concerns
+
+## 3. Findings
+
+### Critical
+- Findings
+
+### High
+- Findings
+
+### Medium
+- Findings
+
+### Low
+- Findings
+
+## 4. Python Quality Notes
+- Type system and strictness
+- Tooling alignment
+- Dependency hygiene
+- Modern Python usage
+
+## 5. React and Frontend Notes
+- Readability and maintainability
+- State and effects
+- Performance-sensitive areas
+- Modern framework usage
+
+## 6. Configuration and Tooling Notes
+- pyproject quality rules
+- frontend config quality
+- gaps and inconsistencies
+
+## 7. Testing and Risk Gaps
+- Missing tests
+- weak assertions
+- release risks
+
+## 8. Recommended Fix Order
+- Immediate blockers
+- short-term fixes
+- structural cleanup