Support personal voices

[FelixSFD]

With iOS 17 and macOS 17, Apple will introduce personal voices. In order to support this properly in the selection, the grouping in Settings needs to be changed.
Right now, voices are grouped by their quality. However, with Personal Voices, Apple has introduced a new property called voiceTraits of type AVSpeechSynthesisVoice.Traits. This can tell us, whether a voice is a personal voice or not.

Unfortunately, I couldn't test Personal Voices yet, because in Beta 1 it doesn't work properly on my iPhone yet.