text: Title: [Dataset] add MedShapeNet to datasets
  Body: ### 🚀 The feature, motivation and pitch
  
  https://medshapenet.ikim.nrw/
  Adding this dataset to PyG w/ an example of training a simple GNN that would enable exploration at scale across the community for allowing AI to understand the plethora of complex medical shapes that exist
  
  
  I will guide @jdhenaos, @loupl, and @ericauld in completing this task (cannot assign them as assignees unfortunately)
  
  
  ### Alternatives
  
  _No response_
  
  ### Additional context
  
  _No response_