Accessibility + visionOS: Observe reduced motion system setting

ReducedMotionView.swift

import SwiftUI

/// An example view that listens to the user's system settings
/// about preferring motion
struct ReducedMotionView: View {
    @Environment(\.accessibilityReduceMotion)
    private var accessibilityReduceMotion

    var body: some View {
        if accessibilityReduceMotion {
            Text("User does NOT like motion... 🤮")
        } else {
            Text("User is ok with things that move.")
        }
    }
}