Add lint --only <files> option to reuse

[klmcadams]

📝 Description of the feature

Work on this PR to add the lint --only <files> option:

fsfe/reuse-tool#903

This should significantly speed up the time it takes to check files in the add-license-headers hook. Right now, lint has to check all files in the repository each time it is run

💡 Steps for implementing the feature

No response

🔗 Useful links and references

No response

Note

Before contributing and starting any work, please make sure you agree with the CLA and sign it in your PR.

[SMoraisAnsys]

@klmcadams Would you mind leaving this issue for hacktoberfest ?