test(doctor): adiciona 71 testes para módulos doctor, fix-handler e orchestrator (#52)

Cobertura completa dos 10 checks modulares (node-version, core-config,
rules-files, agent-memory, entity-registry, git-hooks, skills-count,
commands-count, hooks-claude-count, settings-json, ide-sync), do
fix-handler (dry-run, apply, erros) e do orchestrator (json, quiet, fix).

Author: nikolasdehor