Switch to kts

[denis-fokin]

Description

In order to add other languages support, we need to think about better plugin support. One of the most important tasks is to exclude usage of language-dependent IntelliJ plugin APIs from our common code.

For this, we need to introduce more fine-grained separation of our Gradle-based module system. This can be achieved with more ease if we switch to Kotlin script in Gradle.

Expected behavior

Scripts that are potentially used to build multi-language plugin have to be turned into kts-based scripts.

Environment

GitHub.

Potential alternatives

Go on with Groovy.

Context

No specific context.