Renderer: Blit texture to window instead of using a full renderpass

This may improve performance and allow for render targets to customize how they blit the final texture (allowing for render-to-texture)

include/Nazara/Renderer/WindowSwapchain.hpp

@@ -29,6 +29,8 @@ namespace Nz
 
 			inline RenderFrame AcquireFrame();
 
+			inline void BlitTexture(RenderFrame& renderFrame, CommandBufferBuilder& builder, const Texture& texture) const override;
+
 			inline bool DoesRenderOnlyIfFocused() const;
 
 			inline void EnableRenderOnlyIfFocused(bool enable = true);