Describe the feature

As per the Kotlin docs, Kotlin code needs to use the @Throws annotation to allow Java code to throw/catch exceptions in some cases. Adding @Throws(Mishap::class) to Action#operate, SpellAction#execute, etc would make it easier for Java addons to throw mishaps without resorting to scuffed workarounds.

Note that we apparently already did this for Operator and OperatorBasic:

Additional context

No response