Improve Scroll Bar and Preloader

[VidhanThakur09]

Is your feature request related to a problem? Please describe.

The current Scroll bar Ui has a very basic layout and outdated design and site Loading has no preloader. The screen becomes blank when the website loads. Enhancing the colour scheme of Thumb and Track, improving the preloader and modernizing the scroll bar design would greatly improve the user experience and website presentation

Describe the solution you'd like

• Redesign the Scroll bar and preloader for better visual appeal.
• Improving the scroll bar thump and track.
• Improving the preloader.

Describe alternatives you've considered

Without Preloader and without improvement in Scroll BAR

https://github.com/user-attachments/assets/0fb05cf4-12ba-48c5-ba6c-51dd49a19fd8

Preloader Mockup

https://github.com/user-attachments/assets/581ba556-6358-4767-88ee-db82b2b33997

Additional context @pulkitpathak99 can you assign this issue to me with labels "gssoc-ext" with levels ,"hacktoberfest-accepted";

[VidhanThakur09]

@pulkitpathak99 I would greatly appreciate it if you could kindly assign me with this issue

[VidhanThakur09]

@pulkitpathak99 could you please take a look at this issue?