Adds ResultBuilder support to UIMenu to simplify creation

UIMenu+ResultBuilder.swift

import SwiftUI

typealias Menu = UIMenu
typealias Action = UIAction

@resultBuilder
struct MenuElementBuilder {
    static func buildBlock(_ components: UIMenuElement...) -> [UIMenuElement] { components }
}

extension UIMenu {
    convenience init(_ title: String = "", systemImage name: String? = nil, attributes: Options = [], @MenuElementBuilder _ elements: () -> [UIMenuElement]) {
        self.init(
            title: title,
            image: name.flatMap { UIImage(named: $0) },
            identifier: Identifier(title),
            options: attributes,
            children: elements()
        )
    }
}

extension UIAction {
    convenience init(_ title: String, discoverabilityTitle: String? = nil, systemImage name: String? = nil, attributes: UIMenuElement.Attributes = [], _ action: @escaping () -> Void) {
        self.init(
            title: title,
            image: name.flatMap { UIImage(named: $0) },
            identifier: Identifier(title),
            discoverabilityTitle: discoverabilityTitle,
            attributes: attributes,
            state: .off) { _ in action() }
    }
}