SwiftUI: reorganize a few files (NFC)

Move some of the essential types into a new location.

Author: compnerd

Sources/SwiftWin32UI/Essentials/App.swift renamed to Sources/SwiftWin32UI/App Structure and Behaviour/App.swift

@@ -18,10 +18,12 @@ public protocol App {
 
   /// Creates an instance of the application using the body as the content.
   init()
+
+  /// Initializes and runs the application.
+  static func main()
 }
 
 extension App {
-  /// Initializes and runs the application.
   public static func main() {
     ApplicationMain(CommandLine.argc, CommandLine.unsafeArgv, nil,
                     String(describing: String(reflecting: Self.self)))

Sources/SwiftWin32UI/Essentials/Scene.swift renamed to Sources/SwiftWin32UI/App Structure and Behaviour/Scene.swift

@@ -3,7 +3,7 @@
 
 /// A part of the application's user interface.
 public protocol Scene {
-  /// Creating a Scene
+  // MARK - Creating a Scene
 
   /// The type of scene representing the body of this scene.
   associatedtype Body: Scene

Sources/SwiftWin32UI/Essentials/WindowGroup.swift renamed to Sources/SwiftWin32UI/App Structure and Behaviour/WindowGroup.swift

@@ -1,13 +1,15 @@
 // Copyright © 2020 Saleem Abdulrasool <[email protected]>
 // SPDX-License-Identifier: BSD-3-Clause
 
+/// A scene that presents a group of identically structured windows.
 public struct WindowGroup<Content: View>: Scene {
   public var body: some Scene {
     fatalError("\(#function) not yet implemented")
   }
 
   // MARK - Creating a Window Group
 
+  /// Creates a window group.
   public init(@ViewBuilder content: () -> Content) {
   }
 }

Sources/SwiftWin32UI/CMakeLists.txt

@@ -11,9 +11,9 @@ add_library(SwiftWin32UI SHARED
   SceneBuilder.swift
   ViewBuilder.swift)
 target_sources(SwiftWin32UI PRIVATE
-  Essentials/App.swift
-  Essentials/Scene.swift
-  Essentials/WindowGroup.swift)
+  "App Structure and Behaviour/App.swift"
+  "App Structure and Behaviour/Scene.swift"
+  "App Structure and Behaviour/WindowGroup.swift")
 target_sources(SwiftWin32UI PRIVATE
   "Views and Controls/View.swift")
 target_sources(SwiftWin32UI PRIVATE