navbar hide and show

[BhartiNagpure]

#202 Nabar hide and show

Closes: #202

Description of Changes

As the navbar transparent after scrolling it shows below code and it does not give professional appearance. I resolve this issue by writing script for navbar hide and show . Navbar is show for scrollY 200 and then hide. After scrolling to top it shows the navbar.

Checklist:

• [x] My code adheres to the established style guidelines of this project.
• [x] I have conducted a self-review of my code.
• [x] I have included comments in areas that may be difficult to understand.
• [x] I have made corresponding updates to the project documentation.
• [x] My changes have not introduced any new warnings.

Screenshots

Original	Updated

Please provide any necessary screenshots to illustrate the changes made.