Returns device model identifier for visionOS (ie. `RealityDevice14,1` for Apple Vision Pro)

ModelIdentifier.swift

func visionOSModelIdentifier() -> String {
    if let identifier = ProcessInfo().environment["SIMULATOR_MODEL_IDENTIFIER"] {
        return identifier
    } else {
        var systemInfo = utsname()
        uname(&systemInfo)
                    
        let machine = Mirror(reflecting: systemInfo.machine)
        return machine.children
            .compactMap({ $0.value as? Int8 })
            .filter({ $0 != 0 })
            .map({ String(UnicodeScalar(UInt8($0))) })
            .joined()
    }
}