php - Drupal adding system actions -

I want to create an action that sends emails, but it is different from the click-up's built-in email-action. My question is how should I write an additional action (which is advanced based on Drupt's definition) and should add them to this list?

Should I Write a Module?

Do I edit existing files? (Oh oh! Strange)

Or is there a way to do this already?

The example module has a good explanation for creating a custom action that is

Otherwise you can see using [Rule Module] [2] [2]

[2]: To make your fun.