Add possibility to generate signed commits

[Viserion77]

I tested the tool for the first time today and I found it incredible and very practical! I just have to thank everyone involved!

Well, in this test I realized that the tool generated a commit with my name, but without any signature.

Would it be possible to integrate it with Github to generate the signature automatically? (This already happens in codespaces, for example)

Now:

Expect:

[askpt]

I agree. This change is essential for some actions that require signed commits to be merged.