[Architecture] 헥사고날아키텍처

Reference https://medium.com/coupang-engineering/%EB%8C%80%EC%9A%A9%EB%9F%89-%ED%8A%B8%EB%9E%98%ED%94%BD-%EC%B2%98%EB%A6%AC%EB%A5%BC-%EC%9C%84%ED%95%9C-%EC%BF%A0%ED%8C%A1%EC%9D%98-%EB%B0%B1%EC%9...

Reference https://velog.io/@k7120792/Model-View-ViewModel-Pattern

출처 https://johngrib.github.io/wiki/pattern/state/