[REFACTOR] 회원가입 로그인 공통 예외 응답 포맷, 문서강화#99

SJ-PARKs merged 1 commit intodevelopIndayvidual/Indayvidual-Server:developfrom

refactor/#91_unify_api_error_handlingIndayvidual/Indayvidual-Server:refactor/#91_unify_api_error_handlingCopy head branch name to clipboard