Add Customized Scrollbar

[ramith-kulal]

Description

Currently, website utilizes the default browser scrollbar, which doesn't align well with overall design aesthetics. To enhance user experience . I propose implementing a customized scrollbar that matches the website's color scheme, specifically using a blue color.

Changes to be made:

• Implement CSS styles to customize the scrollbar appearance.
• Utilize a blue color palette consistent with our website's design.
• Test across different browsers and devices to ensure compatibility and accessibility.

Current Scrollbar:

Would like to work under GSSoC'24.