Add a dynamic confirmation process

[ripienaar]

Some thoughts based on https://rachelbythebay.com/w/2020/10/26/num/

The question here is what's the threshold to prompt vs just go ahead? I think we can add a DDL annotation per action, something like "confirm": true, "confirm_prompt": "This will restart {{count}} machines"", in the choria config then we set the specific threshold of 10, 100 or 1000. Over that threshold the prompt is activated if there is a TTY involved

We might also add a option to prompt on unfiltered, something like we have in package app:

https://github.com/choria-plugins/package-agent/blob/31fde418a7d4b160b042c97e49c6274b31094096/application/package.rb#L45