Convert SatsPrice to a Skip multiplatform app

Sources/SatsPrice/SatsPriceApp.swift

@@ -0,0 +1,43 @@
+// This is free software: you can redistribute and/or modify it
+// under the terms of the GNU General Public License 3.0
+// as published by the Free Software Foundation https://fsf.org
+
+import Foundation
+import OSLog
+import SwiftUI
+
+let logger: Logger = Logger(subsystem: "xyz.tyiu.SatsPrice", category: "SatsPrice")
+
+/// The Android SDK number we are running against, or `nil` if not running on Android
+let androidSDK = ProcessInfo.processInfo.environment["android.os.Build.VERSION.SDK_INT"].flatMap({ Int($0) })
+
+/// The shared top-level view for the app, loaded from the platform-specific App delegates below.
+///
+/// The default implementation merely loads the `ContentView` for the app and logs a message.
+public struct RootView : View {
+    public init() {
+    }
+
+    public var body: some View {
+        ContentView(.coinbase)
+            .task {
+                logger.log("Welcome to Skip on \(androidSDK != nil ? "Android" : "Darwin")!")
+                logger.warning("Skip app logs are viewable in the Xcode console for iOS; Android logs can be viewed in Studio or using adb logcat")
+            }
+    }
+}
+
+#if !SKIP
+public protocol SatsPriceApp : App {
+}
+
+/// The entry point to the SatsPrice app.
+/// The concrete implementation is in the SatsPriceApp module.
+public extension SatsPriceApp {
+    var body: some Scene {
+        WindowGroup {
+            RootView()
+        }
+    }
+}
+#endif