Add images to README for enhanced documentation

Added images to README for better visual representation.

Author: jjangminii

README.md

@@ -10,3 +10,8 @@
 - **인증:** 토큰 자동 재발급(401 처리) 및 경쟁 조건(Race Condition) 방지 로직 구현
 - **폼 관리:** React Hook Form 설치
 
+<img width="4068" height="1697" alt="1" src="https://github.com/user-attachments/assets/8cdd704d-2a71-441f-bc85-97d4b18adf67" />
+<img width="4314" height="1798" alt="2" src="https://github.com/user-attachments/assets/1040e9ce-4b4f-4501-ad6f-8d108e4a795e" />
+<img width="4314" height="1798" alt="3" src="https://github.com/user-attachments/assets/8e9b0439-d3bf-4974-95c1-76daeb9efb6a" />
+<img width="4314" height="1798" alt="4" src="https://github.com/user-attachments/assets/c8a98718-75c6-41ae-a862-9afda7880e32" />
+<img width="5752" height="1798" alt="5" src="https://github.com/user-attachments/assets/813109d0-2af8-4951-abbb-6f084b8dbadc" />