Bump kotlin from 1.9.23 to 2.1.0

Bumps `kotlin` from 1.9.23 to 2.1.0.

Updates `org.jetbrains.kotlin:kotlin-stdlib` from 1.9.23 to 2.1.0
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](JetBrains/kotlin@v1.9.23...v2.1.0)

Updates `org.jetbrains.kotlin.jvm` from 1.9.23 to 2.1.0
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](JetBrains/kotlin@v1.9.23...v2.1.0)

---
updated-dependencies:
- dependency-name: org.jetbrains.kotlin:kotlin-stdlib
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: org.jetbrains.kotlin.jvm
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

gradle/libs.versions.toml

@@ -3,7 +3,7 @@
 annotations = "26.0.1"
 
 # plugins
-kotlin = "1.9.23"
+kotlin = "2.1.0"
 changelog = "2.2.0"
 gradleIntelliJPlatform = "2.1.0"
 qodana = "0.1.13"