[Update SwiftUI app to demonstrate English number converter]

swiftui-sample-english-number.swift

var body: some View {
    VStack(spacing: 16) {
        Text(text)
        HStack {
            Spacer()
                .frame(width: 16)
            image
            Spacer()
        }
      
      	// a Persian number
        Text(String("۱۲۳۱۲۳۵۶"))
      
      	// a Persian number converted to its English equivalent
        Text(String("۱۲۳۱۲۳۵۶".toEnglishNumberInt ?? 0))
        
      	Spacer()
    }
}