Add no-op support for JVM / JS targets

[wellingtoncosta]

CrashKiOS was built to provide symbolicated crash reports for Kotlin code on iOS, focused on mobile only projects. A couple of years from now, the community have asked support for JVM / JS support, but Crashlytics does support Android and iOS projects only, altho Bugsnag does have support for JVM and JS projects.

KMP projects that targets either JVM and/or JS will fail to compile when adding CrashKiOS dependency under commonMain. A workaround for it is creating a mobileMain using applyHierarchyTemplate that groups both Android and iOS targets so you can add CrashKiOS dependency under it:

val mobileMain by getting
mobileMain.dependencies {
    api("co.touchlab.crashkios:crashlytics:0.8.6")
}

That works, but that's not too practical, especially for people who have complex projects where CrashKiOS is used across different modules, or for those that want to keep the dependency declarations clean and consistent, working for all targets out of the box.

For this reason, we're going to add no-op support for JVM and JS. This means CrashKiOS can be declared directly under commonMain without requiring a separate source set or hierarchy configuration. This should make it possible to have a single CrashKiOS dependency declaration in commonMain without affecting projects that don't target iOS / Android.