[FEAT] USER_ACTIVITY_HISTORIES, USERS, USER_REGISTER_INFOS 엔티티 구현

[sung-silver]

About Issue 🚀

• 다음 다이어그램을 참고하여 USER_ACTIVITY_HISTORIES, USERS, USER_REGISTER_INFOS 엔티티를 구현합니다
  

Progress ✔️

• USER_ACTIVITY_HISTORIES 구현
• USERS 구현
• USER_REGISTER_INFOS 구현