[Feature] Add option to fail if files changed

[Minecraftschurli]

Is this feature missing in the latest version?

• I'm using the latest release

Is your feature request related to a problem? Please describe.

I currently need to use an extra step to fail if files changed which would be nice cold be handled by this action itself via an input.

Describe the solution you'd like?

An input like fail-if-changed that makes the action fail if it detected changes.

Describe alternatives you've considered?

My current workaround using a separate step that always fails and only run that if this action detected changes.

Anything else?

No response

Code of Conduct

• I agree to follow this project's Code of Conduct

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