[ADD] News, Browse and Settings views ported to SwiftUI

This commit contains WIP SwiftUI versions of most of the views in SideStore.

AltStore/View Extensions/Styles/PillButtonProgressViewStyle.swift

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+//
+//  PillButtonProgressViewStyle.swift
+//  SideStore
+//
+//  Created by Fabian Thies on 22.11.22.
+//  Copyright © 2022 Fabian Thies. All rights reserved.
+//
+
+import SwiftUI
+
+struct PillButtonProgressViewStyle: ProgressViewStyle {
+    let tint: Color
+    
+    func makeBody(configuration: Configuration) -> some View {
+        ZStack(alignment: .leading) {
+            Capsule(style: .continuous)
+                .foregroundColor(tint.opacity(0.15))
+            
+            GeometryReader { proxy in
+                Capsule(style: .continuous)
+//                    .frame(width: proxy.size.width * (configuration.fractionCompleted ?? 0.0))
+                    .foregroundColor(tint)
+                    .offset(x: -proxy.size.width * (1 - (configuration.fractionCompleted ?? 1)))
+            }
+        }
+        .animation(.easeInOut(duration: 0.2))
+    }
+}

AltStore/View Extensions/Styles/PillButtonStyle.swift

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+//
+//  PillButtonStyle.swift
+//  SideStore
+//
+//  Created by Fabian Thies on 18.11.22.
+//  Copyright © 2022 Fabian Thies. All rights reserved.
+//
+
+import SwiftUI
+
+struct PillButtonStyle: ButtonStyle {
+    
+    let tintColor: UIColor
+    var progress: Progress?
+    
+    func makeBody(configuration: Configuration) -> some View {
+        ZStack {
+            if progress == nil {
+                configuration.label
+                    .opacity(configuration.isPressed ? 0.4 : 1.0)
+            } else {
+                ProgressView()
+                    .progressViewStyle(DefaultProgressViewStyle())
+            }
+        }
+        .frame(minWidth: 40)
+        .padding(.horizontal, 16)
+        .padding(.vertical, 8)
+        .background(background)
+        .foregroundColor(self.progress == nil ? .white : Color(tintColor))
+        .clipShape(Capsule())
+    }
+    
+    var background: some View {
+        ZStack {
+            if let progress {
+                Color(tintColor).opacity(0.15)
+
+                ProgressView(progress)
+                    .progressViewStyle(PillButtonProgressViewStyle(tint: Color(tintColor)))
+            } else {
+                Color(tintColor)
+            }
+        }
+    }
+}

AltStore/View Extensions/UIView Representables/SafariView.swift

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+//
+//  SafariView.swift
+//  SideStore
+//
+//  Created by Fabian Thies on 18.11.22.
+//  Copyright © 2022 Fabian Thies. All rights reserved.
+//
+
+import SwiftUI
+import SafariServices
+
+struct SafariView: UIViewControllerRepresentable {
+    let url: URL
+    
+    func makeUIViewController(context: Context) -> some UIViewController {
+        SFSafariViewController(url: url)
+    }
+    
+    func updateUIViewController(_ uiViewController: UIViewControllerType, context: Context) { }
+}

AltStore/View Extensions/UIView Representables/SiriShortcutSetupView.swift

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+//
+//  SiriShortcutSetupView.swift
+//  SideStore
+//
+//  Created by Fabian Thies on 21.11.22.
+//  Copyright © 2022 Fabian Thies. All rights reserved.
+//
+
+import SwiftUI
+
+import UIKit
+import Intents
+import IntentsUI
+
+struct SiriShortcutSetupView: UIViewControllerRepresentable {
+    
+    let shortcut: INShortcut
+    
+    func makeUIViewController(context: Context) -> some UIViewController {
+        let viewController = INUIAddVoiceShortcutViewController(shortcut: shortcut)
+        viewController.delegate = context.coordinator
+        viewController.modalPresentationStyle = .formSheet
+        return viewController
+    }
+    
+    func updateUIViewController(_ uiViewController: UIViewControllerType, context: Context) { }
+    
+    func makeCoordinator() -> Coordinator {
+        Coordinator(shortcut: shortcut)
+    }
+    
+    class Coordinator: NSObject {
+        
+        let shortcut: INShortcut
+        
+        init(shortcut: INShortcut) {
+            self.shortcut = shortcut
+        }
+    }
+}
+
+extension SiriShortcutSetupView.Coordinator: INUIAddVoiceShortcutViewControllerDelegate {
+    func addVoiceShortcutViewController(_ controller: INUIAddVoiceShortcutViewController, didFinishWith voiceShortcut: INVoiceShortcut?, error: Error?) {
+        
+        // TODO: Handle errors
+        controller.dismiss(animated: true)
+    }
+    
+    func addVoiceShortcutViewControllerDidCancel(_ controller: INUIAddVoiceShortcutViewController) {
+        controller.dismiss(animated: true)
+    }
+}