Create customisable confirmation modals

[NathanVss]

As such:

We need to be able to customize

• Title
• Children
• Buttons

It would be cool to be able to use the same logic as the built in modals of cunningham as such with an await:

export const ConfirmationModal = {
  render: () => {
    const modals = useModals();

    const ask = async () => {
      const decision = await modals.confirmationModal();
      alert(`You decided ${decision}`);
    };

    useEffect(() => {
      ask();
    }, []);

    return <Button onClick={ask}>Open</Button>;
  },
};