adding service worker structure for dicomscan skullremoval and volumepreparation

VolumePrepService.cpp

@@ -0,0 +1,12 @@
+#include "VolumePrepService.h"
+
+#include <vtkImageData.h>
+
+vtkImageData* VolumePrepService::prepare(vtkImageData* input)
+{
+    if (!input) return nullptr;
+    vtkImageData* out = vtkImageData::New();
+    out->DeepCopy(input);
+    out->Modified();
+    return out;
+}