Resolve "Mehrere Fenster, Abhängigkeiten von Core zu Fenster+Swapchain etc"

Closes #89 (closed)

include/vkcv/Handles.hpp

@@ -102,6 +102,18 @@ namespace vkcv
 		
 	};
 
+	class WindowHandle : public Handle {
+		friend class WindowManager;
+	private:
+		using Handle::Handle;
+	};
+
+	class SwapchainHandle : public Handle {
+		friend class SwapchainManager;
+	private:
+		using Handle::Handle;
+	};
+
     class CommandStreamHandle : public Handle {
         friend class CommandStreamManager;
     private: