Add approval workflows to smart chasing cadences

It would be useful to add a "require approval" setting for steps within a chasing cadence that requires a user to review and approve the pending steps (in bulk) before they execute. For example - if we have a chasing cadence that emails a cancellation notice to the customer at 30 days past due, the system would create an approval task for each customer in that cadence before the emails are sent to the customer.