Add support for referencing flag types in documentation

[Name-Alin]

I'm trying to generate documentation for my cli app and I need to also add the data related to flag types.

From what I can see this change would require to update github.com/urfave/cli/v3 to a newer version and adding the type to the cliTabularFlagTemplate struct

If needed I can help with a PR for this
Thanks

[Name-Alin]

@dearchap, @Juneezee Can we also make a release for this issue?