[Feat] API 서버 Entity Class 생성

[TaeYeongKwak]

📋 설명

API 서버에서 사용할 ExcelInfo, Member 클래스 생성

📌 작업 리스트

• [x] ExcelInfo Class 생성
• [x] Member Class 생성

@tommysgit @AnTaeWook @muyongKim

[TaeYeongKwak]

marked the checklist item ExcelInfo Class 생성 as completed

[TaeYeongKwak]

marked the checklist item ExcelInfo Class 생성 as incomplete

[TaeYeongKwak]

mentioned in commit 618f56ab2748beacedad27ba6324138c02b0378d

[TaeYeongKwak]

marked the checklist item ExcelInfo Class 생성 as completed

[TaeYeongKwak]

marked the checklist item Member Class 생성 as completed