[feat]: Navbar enhancement

[Parvezkhan0]

• [x] The navbar should have search bar where users can search for different product

• [x] The navbar should also have a 'cart' option where user can track their orders

• [x] The navbar should also have a 'Become a Seller' option for users who want to sell their product

• [ ] The navbar should also have a 'sign in' option

The navbar should look something like the below image

[AparajitaSingh121416]

Hey @SyedImtiyaz-1, I can fix this issue, please assign this issue to me.