Add usage example to README

Added usage example section with a GIF.

Author: anhnh2002

README.md

@@ -65,6 +65,10 @@ codewiki generate --github-pages --create-branch
 
 **That's it!** Your documentation will be generated in `./docs/` with comprehensive repository-level analysis.
 
+### Usage Example
+
+![CLI Usage Example](https://github.com/FSoft-AI4Code/CodeWiki/releases/download/assets/cli-usage-example.gif)
+
 ---
 
 ## What is CodeWiki?
@@ -277,4 +281,4 @@ If you use CodeWiki in your research, please cite:
 
 ## License
 
-This project is licensed under the MIT License - see the [LICENSE](./LICENSE) file for details.
+This project is licensed under the MIT License - see the [LICENSE](./LICENSE) file for details.