Local itk-vtk-viewer

It is ready to install the itk-viewer in case it is not installed in qim https://www.notion.so/qim-dtu/Improve-CLI-viz-f4254522fa1e4159b8ce6d9206793b13

qim3d/viz/itk_vtk_viewer/run.py

@@ -12,6 +12,10 @@ import time
 
 def itk_vtk_viewer(filename:str = None):
 
+    # Get rid of trailing slashes
+    filename = os.path.normpath(filename)
+
+    # Start the http server
     qim3d.utils.start_http_server(os.path.dirname(filename))
 
     # We do a delay open for the browser, just so that the itk-vtk-viewer has time to start.