Update README with image and repository details

Author: W2Wizard

README.md

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 NXTApp is an open-source peer-to-peer education platform designed as a monorepo to manage various components of the application. The repository contains multiple services, primarily written in C#, alongside modern frontend technologies like Svelte and TypeScript.
 
+<img width="1311" height="1406" alt="image" src="https://github.com/user-attachments/assets/0eea5b7d-9705-43dc-a8a4-f44c5f3e589d" />
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 ## Repository Structure
 
 - **Backend**: Contains the backend services for the application, written in C#.
@@ -57,4 +60,4 @@ Contributions are welcome! Please see our [CONTRIBUTING.md](CONTRIBUTING.md) for
 
 ## 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.