Adiciona documentação de arquitetura completa com diagramas Mermaid#10

Bulletdev merged 3 commits intomainBulletdev/go-cart-api:mainfrom

copilot/fix-bc5fc426-055e-4312-9a45-961ecaf271d6Bulletdev/go-cart-api:copilot/fix-bc5fc426-055e-4312-9a45-961ecaf271d6Copy head branch name to clipboard