[Suggestion] Suppresses KMP "actual" and "expect" class warnings

[naoele]

Overview

Although it may be a low priority,
the official Kotlin documentation has a setting to suppress warnings for the "actual" and "expect" classes.

Problem description:

'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573

https://kotlinlang.org/docs/multiplatform-expect-actual.html#expected-and-actual-classes

kotlin {
    compilerOptions {
        // Common compiler options applied to all Kotlin source sets
        freeCompilerArgs.add("-Xexpect-actual-classes")
    }
}

Can we apply this to this project?

[naoele]

I will do this task 🙋