Write out GeneratedBy correctly

[tsalo]

Closes #70.

Changes proposed in this pull request

• Port over write_derivative_description from Replace restricted confound sets with config files PennLINC/xcp_d#1255.

[codecov]

Codecov Report

Attention: Patch coverage is 2.56410% with 38 lines in your changes missing coverage. Please review.

Project coverage is 30.58%. Comparing base (24a0dcf) to head (1e99d15).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/fmripost_aroma/utils/bids.py	2.63%	37 Missing ⚠️
src/fmripost_aroma/cli/run.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #73      +/-   ##
==========================================
- Coverage   30.85%   30.58%   -0.28%     
==========================================
  Files          26       26              
  Lines        2330     2351      +21     
  Branches      365      370       +5     
==========================================
  Hits          719      719              
- Misses       1590     1611      +21     
  Partials       21       21              

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