create a tab for about us, contact us and also disclaimer

Since we are not liable to the links that are being redirected to we do not bear any responsibility. This disclaimer should be present in that tab and also contact details and that this project is open source should all be mentioned and how they can pull a PR.

<img width="186" height="87" alt="Image" src="https://github.com/user-attachments/assets/2a49e535-5e8e-4cb6-a57c-bb4b178d250e" />