<Listbox.footer /> Add confirmation component

# Feature request
## Prerequisites

## Is your feature request related to a problem?
When using the Listbox with a footer (which has "Apply" and "Cancel" buttons), I want to prompt the user to confirm when they press "Apply".

## Describe the solution you'd like

{
// if 'confirmation' prop exists, this is not used
// else, it gets fired on click 'accept'
}}
confirmation={}
/>

## Describe alternatives you've considered
1. Using a `Toast` above the Listbox.
2. Allowing a node to go in the footer above the buttons.

## Additional context
Compliance Maps has a custom built solution that adds text when you change your choices. I'm looking to replace it with ListBox: