Loading state for buttons using isLoading prop

[burhanuday]

The button component has a disabled state but not a loading state

Describe the solution you'd like
The loading state for buttons is very convenient to have. For example, when submitting a form, you can set prop isLoading={true} on the button which would render a spinner inside the button

Checkout ChakraUI and MaterialUI

We already have a Loading component which can be rendered inside the Button if isLoading prop is true

Additional context
I'd like to pick this task up once it gets green ligh