Create fits files

[pecom]

Adds functionality to save blended/deblended batches as FITS files.

[codecov]

Codecov Report

Attention: 93 lines in your changes are missing coverage. Please review.

Comparison is base (cef8222) 61.15% compared to head (ed30853) 57.96%.
Report is 1 commits behind head on dev.

Files	Patch %	Lines
btk/blend_batch.py	9.70%	93 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              dev     #465      +/-   ##
==========================================
- Coverage   61.15%   57.96%   -3.20%     
==========================================
  Files          19       19              
  Lines        1555     1658     +103     
==========================================
+ Hits          951      961      +10     
- Misses        604      697      +93     

Flag	Coverage Δ
unittests	57.96% <9.70%> (-3.20%)	⬇️

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[ismael-mendoza]

This looks good to me! Might you consider adding a unit test to ensure these functions work? There is an example in test_pipeline.py

[ismael-mendoza]

another question @pecom is the saving and loading with fits files useful to you for the DeblendBatch ? If not I would suggest not including it

[ismael-mendoza]

@pecom I'm closing this for now, is it finished? feel free to let me know or re-open if you are still interested