feature: created full side bar

[namansharma3007]

• Sidebar Creation: A fully functional sidebar has been implemented.
• Issue Resolution: Successfully addressed the concerns outlined in Issue #2.
• Additional Functionalities: New features have been added, which are flexible for further customization and development.
• Logo Placeholder: A dummy logo has been used in the implementation due to the unavailability of the official site logo. The maintainer will need to replace it with the actual logo.
• Code Cleanup: The codebase has been refined to improve readability and maintainability for future contributions.

https://github.com/user-attachments/assets/564e156f-8811-4373-9985-00ff384e9a6b

[Ashmitkumar1]

@namansharma3007 Awesome work bro

[namansharma3007]

Thanks man 👍 You are my first open source contribution. I will never forget you.