deallocate pipeline in renderer on pipeline destroy

engine/inc/renderer/3d/pipeline/renderer_3d_pipeline.hpp

@@ -16,12 +16,13 @@ namespace Tyra {
 
 class Renderer3DPipeline {
  public:
-  Renderer3DPipeline() {}
+  Renderer3DPipeline() { onDestroy = nullptr; }
   ~Renderer3DPipeline() {}
 
   virtual void setRenderer(RendererCore* core) = 0;
   virtual void onUse() = 0;
   virtual void onUseEnd() = 0;
+  std::function<void(Renderer3DPipeline*)> onDestroy;
 };
 
 }  // namespace Tyra