Solution for [ENG-3935](https://linear.app/comm/issue/ENG-3935/consider-using-dark-mode-in-alerts-on-native).
This diff introduces a wrapper for React Native alerts, which synchronizes currently selected theme in the app with alert style. Right now `userInterfaceStyle` is only supported on iOS.
Light theme alert:
{F646510}
Dark theme alert:
{F646511}