text: Title: [DOC] Add a reference for MERLIN anomaly detector
  Body: ### Describe the issue linked to the documentation
  
  we recently added the MERLIN anomaly detection algorithm but there is no reference to the original paper
  
  https://ieeexplore.ieee.org/document/9338376
  
  need to add this to the docstrings 
  
  ### Suggest a potential alternative/fix
  
  _No response_