Any way to handle delete or purge actions?

### Feature request

Hi, new user here, I've set up this action to apply to my private cluster and it works like a charm. Is there a recommended pattern for handling teardown or delete/purge removal of manifests? Do you perform a `kubectl delete` manually, or is there a way to do this with the action? Thanks for your ideas!

The payload names no files, tests, or entry points. Start by reviewing the action's current deployment inputs and Kubernetes manifest handling; define the intended delete or purge behavior and a verifiable way to confirm it.

Written by the indexing model from the issue text.