Add mode change (dark and light) in Navbar

[rovi555yadav]

Feature description

👀 Have you spent some time to check if this issue has been raised before?

• [X] I checked and didn't find similar issue

🏢 Have you read the Code of Conduct?

• [X] I have read the Code of Conduct

[divyaannsh]

please assign this to me thank you

[Ganaik2004]

@rohanbabbar04 i want to work on this issue. please assign it to me.