Add WebUI interface image to README

- Included a screenshot of the WebUI interface in the README.md to enhance user guidance and provide a visual reference for new users.
- Updated the WebUI features section to maintain clarity and relevance in documentation.

Author: fr4iser90

README.md

@@ -116,6 +116,8 @@ docker-compose --profile webui up
 # Access at http://localhost:8080
 ```
 
+![WebUI Interface](assets/webui.png)
+
 **WebUI Features:**
 - ✅ Start scans via web interface
 - ✅ Live progress and logs during scan execution