Please give examples in Groovy DSL too

[kolotyluk]

Is your feature request related to a problem? Please describe

It is really frustrating reading documentation for Gradle that is in one DSL or another, but not both.
For people new to Gradle, this is particularly frustrating because it can be extremely difficult trying to
translate from one DSL to the other.

Describe the solution you'd like

Could you please give 'working/tested' examples in both DSLs like is done in the official Gradle documentation.

Describe alternatives you've considered
If you know of a tool that can translate Gradle from Groovy to Kotlin and visa versa, I would like to know about it.

Additional context

n/a

Are you willing to provide a PR?

n/a

[IgnatBeresnev]

Will be done as part of #2269