add Cart component and integrate with Redux; implement cart functionality in Header and RestaurantMenu

add cartSlice actions for managing cart items and export reducer

add Redux for state management; implement cart slice and integrate with Header component

remove unnecessary blank lines in Header component

implement user context for authentication; enhance lazy loading for About component and improve restaurant data handling

add user context and update restaurant data fetching; improve header component with user login state

add promoted label to RestaurantCard and improve loading state handling

fix indentation in User.js

10 video completed and ui also get more imnpressive

tailwind css added

tailwind css start

hello world