Add second init and close stage for GraphicsApp

openVulkanoCpp/Base/IGraphicsApp.hpp

@@ -24,6 +24,8 @@ namespace OpenVulkano
 		~IGraphicsApp() override = default;
 
 		virtual void Init() = 0;
+		virtual void InitPostGraphics() {}
+		virtual void CloseFinalize() {}
 		[[nodiscard]] IGraphicsAppManager* GetGraphicsAppManager() const { return m_manager; }
 		void SetGraphicsAppManager(IGraphicsAppManager* manager) { m_manager = manager; }
 		[[nodiscard]] virtual std::string GetAppName() const = 0;