text: Title: README license is incorrect
  Body: ### Description:
  
  The BSD license listed in our README is *not* the skimage license. The full license is:
  
  https://github.com/scikit-image/scikit-image/blob/main/LICENSE.txt
  
  This is the one that should be linked to, instead of inlining it in the README.
  
  ### Way to reproduce:
  
  _No response_
  
  ### Traceback or output:
  
  _No response_
  
  ### Version information:
  
  _No response_