Consider suggesting option `-A` to add and remove changed files

[azeemba]

The current documentation has a section on removing files. However, the documentation makes it sound like you have to know which files you want to remove in advance.

This doesn't have to be the case. The action already supports arbitrary arguments to git add. So -A/--no-ignore-removal can be used to ask git to commit any files that have been deleted in the local repository (just as it would have added any modified or new files).

I am happy to send a PR but I wanted to create an issue first to make sure my suggestion makes sense.

[EndBug]

Seems like a good idea! Yeah, it would be great if you could submit a PR ❤️

[github-actions]

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