Firebase Crashlytics & Non-fatal exception logging

[matejsemancik]

On iOS, we need to get symbolicated crash reports working. There is CrashKiOS library that does that, but it turns out it does not really work with dynamically linked frameworks due to App Thinning.

There is a handful of resources available on that matter:
https://youtrack.jetbrains.com/issue/KT-58461
https://slack-chats.kotlinlang.org/t/14161460/hello-wave-i-have-a-kmp-project-with-multiple-modules-that-i

Long story short: We don't like dynamically linked Crashlytics in KMP, it screws up iOS app with App Thinning.

Solution (short):
touchlab/KMMBridge#207 (comment)

Solution (long):

• Get rid of CrashKiOS dependency and use https://github.com/rickclephas/NSExceptionKt directly to set
  unhandled exception hook (use only core artifact from that library)
• Create platform PlatformCrashlytics binding in :shared:platform module to access Crashlytics natively
• From unhandled exception hook, use the platform interface to access
  native Crashlytics and log errors there (like in provided blob, but without cinterop dependency, calling into platform interface instead):
  https://github.com/rickclephas/NSExceptionKt/blob/master/nsexception-kt-crashlytics/src/commonMain/kotlin/com/rickclephas/kmp/nsexceptionkt/crashlytics/Crashlytics.kt

Alternative solution:

• Link KMP framework statically, but that would probably require adjusting build settings because of moko-resources:
  https://github.com/icerockdev/moko-resources#iosmacos-static-kotlin-frameworks-support