Tutorials should cover multiple programming languages

[jiyewushen]

Issue type

Wrong or misleading information

Problem description

在 Developing Custom Gradle Types 7.0、8.0

• Gradle at (7.0,8.5] not support kotlin demo，howerver，when the managed properties was an incubating feature，it supported Java、Kotlin、Groovy demo。

Context (optional)

No response

Page with the problem

https://docs.gradle.org/7.0/userguide/custom_gradle_types.html

[ov7a]

Thank you for your interest in Gradle!

This is a valid documentation issue that we will address.

[lkasso]

I am actively working on re-writing the entire user manual and as I go through it, I make sure sections have both a Groovy and a Kotlin example.