[Admin] Component: Update event details

[justinyoo]

• endpoint: PUT admin/events/{eventID}
• MUST be users with admin role

ASSUMPTION: You've logged in as an admin

[justinyoo]

• story 1: 화면에 뿌려주기 [Admin] Component: Update event details - populate event details #198
  1. 기존 OpenAPI 엔드포인트 활용 [OpenAPI] Add endpoint for view event details #207
  2. 어드민 UI 콤포넌트 설계 [Admin] Component: Update event details - UI component (view) #199
  3. 어드민 UI 콤포넌트 로직 구현 [Admin] Component: Update event details - UI logic (view) #200
• story 2: 데이터 업데이트 [Admin] Component: Update event details - update event details #201
  1. OpenAPI 명세 설계 [OpenAPI] Add endpoint for update event details #202
  2. 백엔드 API 구현 [Backend API] Implement endpoint for update event details #203
  3. 어드민 UI 콤포넌트 설계 [Admin] Component: Update event details - UI component (update) #204
  4. 어드민 UI 로직 구현 [Admin] Component: Update event details - UI logic (update) #205