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

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

AltStore/View Components/AppIconView.swift

@@ -0,0 +1,35 @@
+//
+//  SwiftUIView.swift
+//  SideStore
+//
+//  Created by Fabian Thies on 18.11.22.
+//  Copyright © 2022 Fabian Thies. All rights reserved.
+//
+
+import SwiftUI
+
+struct AppIconView: View {
+    let iconUrl: URL?
+    var size: CGFloat = 64
+    var cornerRadius: CGFloat {
+        size * 0.234
+    }
+    
+    var body: some View {
+        if let iconUrl, #available(iOS 15.0, *) {
+            AsyncImage(url: iconUrl) { image in
+                image
+                    .resizable()
+            } placeholder: {
+                Color(UIColor.secondarySystemBackground)
+            }
+            .frame(width: size, height: size)
+            .clipShape(RoundedRectangle(cornerRadius: cornerRadius, style: .continuous))
+        } else {
+            RoundedRectangle(cornerRadius: cornerRadius, style: .continuous)
+                .background(Color.secondary)
+                .frame(width: size, height: size)
+        }
+    }
+}
+