Ability to check whether Qonversion has been initialized #356
Description
It would be nice to have the ability to check whether the framework has been initialized.
My use case is that I use checkEntitlements when the user returns to the app, and in some edge cases the user apparently puts the app in background before the initialization completes, then comes back to it and the checkEntitlements is triggered.
I can work around the problem and it's not that problematic, but could come in handy to have a quick way to check in some other cases. Plus if I understand it correctly it should be just a matter of exposing something like:
abstract class Qonversion {
...
static bool get isInitialized => _backingInstance != null
...
}