Update to Kotlin 2.1+

[Jolanrensen]

Bumping this requires:

• some fixes in the :expression-converter plugin (Fixes :plugins:expressions-converter to work with Kotlin 2.1 #997, can only be merged after updating to 2.1)
• fixing the :generator plugin to workers (Keywords generator plugin: moved and fixed for Kotlin 2.1 #996)
• Updating Gradle to 8.11 https://docs.gradle.org/current/userguide/compatibility.html (for our gradle plugin) (Bumping gradle to 8.11 #1001)
• updating jupyter by moving it to a separate module first: Move Jupyter integration in new dataframe-jupyter module #775
  • (Line_0.jupyter.kts (13:48 - 64) Class 'org.jetbrains.kotlinx.dataframe.jupyter.ImportDataSchema' was compiled with an incompatible version of Kotlin. The actual metadata version is 2.1.0, but the compiler version 1.9.0 can read versions up to 2.0.0.)

EDIT: Apparently, DataFrame cannot target Kotlin 2.1 until the Kotlin Jupyter kernel/notebooks fully support K2. They are planning around February for this.

EDIT2: Jupyter 0.12.0-356 should be compatible with DataFrame targeting 2.1.0 :D

[Omico]

Gradle 8.11.1 has been released. Don't forget to run the gradle wrapper task to update the wrapper jar & scripts.