Ability to override app name in spin kube scaffold

[endocrimes]

I often use spin kube scaffold in automation, with many versions of an application in the same "image", which results in needing to do rewrites-in-place of the name field. It would be helpful if spin kube scaffold --name my-app was possible.

[bacongobbler]

Agreed. A --name flag would be a nice addition to the project.