Bug: Cannot use columns with `RequiresOptIn` types in Notebook

[Jolanrensen]

In notebooks, whenever an accessor is generated for an experimental type that requires @OptIn, we get compiler errors:

This makes sense, as each usage of that type, or the entire snippet, would need to be annotated with @OptIn, however, that does make it currently impossible to store any experimental type in a DataFrame and use it.

We could try to ask the notebook team what to do about it, or simply introduce a list of opt-in classes for dataFrameConfig in notebooks.

[Jolanrensen]

You can make it work by enabling the Registry flag
kotlin.notebook.projectWideExtraCompilerArguments.enabled in IntelliJ 253+ and adding -opt-in=kotlin.uuid.ExperimentalUuidApi (or whatever class you want to opt-in for) to the Compiler extra arguments in the Kotlin Notebook settings.