Maven dokka:help

[binkley]

Is your feature request related to a problem? Please describe
I'd like to get command line help in Maven when using Dokka.

Describe the solution you'd like
Ideally, I can run mvn dokka:help to see descriptions of goals for the Maven Dokka plugin. This is common practice with many Maven plugins, though not an enforced guideline from Apache.

Describe alternatives you've considered
Manual researching in the web.

Are you willing to provide a PR?
Possibly. I can check if it is quick to do.

[aSemy]

A help task should be generated, but perhaps it was lost during #2911

[binkley]

That was fast! 😃
Thanks 🙏