Add real-time notifications and error visualization section

Added an image and description for real-time notifications and error visualization.

Author: DHowor1d

README.md

@@ -69,6 +69,11 @@
       <br>
       3D
     </td>
+    <td align="center">
+      <img src="https://github.com/user-attachments/assets/6020cc8a-b347-4459-9f50-efcfe019a05d" alt="실시간 알림& 에러 시각화" height="300" />
+      <br>
+      실시간 알림& 에러 시각화
+    </td>
     <td align="center">
       <img src="https://github.com/user-attachments/assets/2221c01b-6b23-407c-a50f-2cec258516b5" alt="2D" height="300" />
       <br>