Delete project files when being used in a parent project

[srtfisher]

Description

I would like to see the standalone-project files (.github, .wp-env.json, .deployignore, .phpcs.xml, package.lock.json, .github (folder), .phpcs (folder) etc.) deleted when this project is configured to be rolled up inside a parent project.

Use Case

When scaffolding in an existing wp-content project the standalone project files should be deleted.

[kevinfodness]

This works as expected on the latest version of CWP (must have been handled as part of a separate task).