SwiftUI Gap class inspired from Flutter Gap

SwiftUI.Gap.swift

import SwiftUI

public struct Gap: View {
    private let spacing: CGFloat
    private let axis: Axis
    private let backgroundColor: Color

    public init(
        spacing: CGFloat,
        axis: Axis = .vertical,
        backgroundColor: Color = .clear
    ) {
        self.spacing = spacing
        self.axis = axis
        self.backgroundColor = backgroundColor
    }

    public var body: some View {
        Spacer()
            .frame(
                width: axis == .horizontal ? spacing : nil,
                height: axis == .vertical ? spacing : nil
            )
    }
}