Added about us page

[yashpandav]

PR for Issue #91: Added About Us Page

Description:

• Added a new About Us page to the application.
• Implemented responsiveness for various screen sizes.
• Integrated a 3D hover effect for cards to enhance interactivity and user experience.

Demo:

DSA.Problem.Solutions.-.Google.Chrome.2025-01-12.22-21-10.mp4

Key Features:

1. Responsive layout across all devices.
2. Visually appealing card design with hover effects.
3. Matches the existing design language of the platform.

Checklist:

• Page layout is fully responsive.
• Hover effects work smoothly across browsers.
• Code has been tested for performance and bugs.

Hey @PRIYESHSINGH24, I hope that you like these changes and merge this PR if you have any doubts than feel free to ask. 😊