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

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

AltStore/Views/Browse/BrowseAppPreviewView.swift

@@ -0,0 +1,48 @@
+//
+//  BrowseAppPreviewView.swift
+//  SideStore
+//
+//  Created by Fabian Thies on 20.11.22.
+//  Copyright © 2022 Fabian Thies. All rights reserved.
+//
+
+import SwiftUI
+import AltStoreCore
+
+struct BrowseAppPreviewView: View {
+    let storeApp: StoreApp
+    
+    var body: some View {
+        VStack {
+            AppRowView(app: storeApp)
+            
+            if let subtitle = storeApp.subtitle {
+                Text(subtitle)
+            }
+            
+            if !storeApp.screenshotURLs.isEmpty {
+                HStack {
+                    ForEach(storeApp.screenshotURLs.prefix(2)) { url in
+                        if #available(iOS 15.0, *) {
+                            AsyncImage(url: url) { image in
+                                image
+                                    .resizable()
+                                    .aspectRatio(contentMode: .fit)
+                            } placeholder: {
+                                Color(UIColor.secondarySystemBackground)
+                            }
+                            .cornerRadius(8)
+                        }
+                    }
+                }
+                .frame(height: 300)
+            }
+        }
+    }
+}
+
+//struct BrowseAppPreviewView_Previews: PreviewProvider {
+//    static var previews: some View {
+//        BrowseAppPreviewView()
+//    }
+//}