Feature request: Document how to know which features are available for create-app command

[jarl-dk]

According to https://docs.grails.org/latest/ref/Command%20Line/create-app.html the grails command create-app takes an optional flag --features, however there is no list of possible feature to give as argument to --features.

It would make much sense to have argument --list-features to create-app. Or at least document on https://docs.grails.org/latest/ref/Command%20Line/create-app.html how you can know what features that are available

I have later figures out that features are dependent on the profile, and a list of features seem available for a given profile using

grails profile-info <<PROFILE>>

But then at least that should be documented, both on web and in command line help message.

See also grails/grails-core#11751