Add dataset links to config object

[tsalo]

Closes none.

Changes proposed in this pull request

• Rename write_dataset_description function to write_derivative_description.
• Add dataset_links to config object.
• Write out DatasetLinks to dataset_description.json.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.41%. Comparing base (a8c402b) to head (7af7ebd).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1266      +/-   ##
==========================================
+ Coverage   78.40%   78.41%   +0.01%     
==========================================
  Files          59       59              
  Lines        7204     7210       +6     
  Branches     1064     1065       +1     
==========================================
+ Hits         5648     5654       +6     
  Misses       1286     1286              
  Partials      270      270              

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