Added github.com/urfave/cli/v3 example

[nicfit]

Describe your changes

Adds an example for the urfave/cli package.

Checklist before requesting a review

• [ ] I have read CONTRIBUTING.md
• [x] I have performed a self-review of my code

If this is a feature

• [ ] I have created a discussion
• [ ] A project maintainer has approved this feature request. Link to comment: