Add Sparkle update framework for macOS

macOS/Updates/UpdatesSettings.swift

@@ -0,0 +1,32 @@
+import Defaults
+import SwiftUI
+
+struct UpdatesSettings: View {
+    @EnvironmentObject<UpdaterModel> private var updater
+
+    @State private var automaticallyChecksForUpdates = false
+    @Default(.enableBetaChannel) private var enableBetaChannel
+
+    var body: some View {
+        Section(header: SettingsHeader(text: "Updates")) {
+            Toggle("Check automatically", isOn: $automaticallyChecksForUpdates)
+            Toggle("Enable beta channel", isOn: $enableBetaChannel)
+        }
+        .onAppear {
+            automaticallyChecksForUpdates = updater.automaticallyChecksForUpdates
+        }
+        .onChange(of: automaticallyChecksForUpdates) { _ in
+            updater.setAutomaticallyChecksForUpdates(automaticallyChecksForUpdates)
+        }
+        .frame(maxWidth: .infinity, alignment: .leading)
+
+        Spacer()
+    }
+}
+
+struct UpdatesSettings_Previews: PreviewProvider {
+    static var previews: some View {
+        UpdatesSettings()
+            .injectFixtureEnvironmentObjects()
+    }
+}