Add images to README for enhanced presentation

Added additional images to the README for better visualization.

Author: jessielw

README.md

@@ -3,7 +3,10 @@
 A modern MP4 muxing tool with a desktop GUI interface, powered by MP4Box.
 
 <img width="270" alt="image" src="https://github.com/user-attachments/assets/d390faf3-7a9f-4431-894b-bb1c7db2ec84" />
-
+<img width="270" alt="image" alt="image" src="https://github.com/user-attachments/assets/f3425923-695d-4eae-bd0b-93a80ba6da16" />
+<img width="270" alt="image" src="https://github.com/user-attachments/assets/b90a88fa-a0e0-4cf4-b6b6-16012a45f61c" />
+<img width="270" alt="image" src="https://github.com/user-attachments/assets/442d347b-cf52-41c1-abcf-6c476c6d6a65" />
+<img width="270" alt="image" src="https://github.com/user-attachments/assets/450d523b-c745-49b2-8544-2bee923297b5" />
 
 ## Features