feat (wip): refactor of main func into actual organized classes

vtk/src/helperClasses/BackgroundImage.h

@@ -0,0 +1,22 @@
+#ifndef BACKGROUND_H
+#define BACKGROUND_H
+
+#include "Layer.h"
+#include <vtkImageReader2Factory.h>
+
+class BackgroundImage : public Layer {
+private:
+  std::string imagePath;
+  vtkSmartPointer<vtkImageReader2Factory> readerFactory;
+
+  void updateImage();
+
+
+public:
+  BackgroundImage(std::string imagePath);
+
+  std::string getImagePath();
+  void setImagePath(std::string imagePath);
+};
+
+#endif