Flattened the folder structure of the Libraries now that the idea is to use precompiler processors to filter out platform-specific code.

Sources/Coordination/Routers/BaseNavigationRouter.swift

@@ -10,6 +10,7 @@
 //
 //===----------------------------------------------------------------------===//
 
+#if os(iOS)
 import UIKit
 
 /// This is a base class for the `NavigationRouter` concrete router implementations.
@@ -70,3 +71,4 @@ extension BaseNavigationRouter: UINavigationControllerDelegate {
     }
 
 }
+#endif

Sources/Coordination/Routers/ModalNavigationRouter.swift

@@ -10,6 +10,7 @@
 //
 //===----------------------------------------------------------------------===//
 
+#if os(iOS)
 import UIKit
 
 /// This class is responsible for showing view controllers modally, as it is a concrete implementation of the `Router` protocol.
@@ -88,3 +89,4 @@ private extension ModalNavigationRouter {
     }
     
 }
+#endif

Sources/Coordination/Routers/PushNavigationRouter.swift

@@ -10,6 +10,7 @@
 //
 //===----------------------------------------------------------------------===//
 
+#if os(iOS)
 import UIKit
 
 /// This class is responsible for pushing view controllers into a navigation controller, as it is a concrete implementation of the `Router` protocol.
@@ -66,3 +67,4 @@ extension PushNavigationRouter: Router {
     }
     
 }
+#endif

Sources/Coordination/Routers/WindowRouter.swift

@@ -10,6 +10,7 @@
 //
 //===----------------------------------------------------------------------===//
 
+#if os(iOS)
 import UIKit
 
 /// This class is responsible for populating the window of an application.
@@ -45,3 +46,4 @@ public class WindowRouter: Router {
     }
     
 }
+#endif