Always keep ICC profile and orientation to avoid display issues; keep copyright and artist fields by default

[stefmolin]

• Restructure package
• Always keep ICC profile and orientation to avoid display issues
• Keep copyright and artist fields by default, but allow for opt-in deletion both when deleting everything and when deleting by group. Note that this is a change from before where everything was removed by default.

Closes #101

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (2ed14f7) to head (bef2202).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #103   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            6         9    +3     
  Lines          131       185   +54     
  Branches        10        12    +2     
=========================================
+ Hits           131       185   +54     

Files with missing lines	Coverage Δ
src/exif_stripper/cli.py	100.00% <100.00%> (ø)
src/exif_stripper/fields.py	100.00% <100.00%> (ø)
src/exif_stripper/processing.py	100.00% <100.00%> (ø)
tests/common.py	100.00% <100.00%> (ø)
tests/conftest.py	100.00% <100.00%> (ø)
tests/test_cli.py	100.00% <100.00%> (ø)
tests/test_processing.py	100.00% <100.00%> (ø)

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