feat: Add --dry-run option

[janw]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.92%. Comparing base (9b7c033) to head (2ad852b).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #228      +/-   ##
==========================================
+ Coverage   91.89%   91.92%   +0.02%     
==========================================
  Files          22       22              
  Lines        1148     1152       +4     
  Branches      104      106       +2     
==========================================
+ Hits         1055     1059       +4     
  Misses         67       67              
  Partials       26       26              

Files with missing lines	Coverage Δ
podcast_archiver/base.py	81.63% <100.00%> (ø)
podcast_archiver/cli.py	81.63% <100.00%> (+0.18%)	⬆️
podcast_archiver/enums.py	93.18% <100.00%> (+0.15%)	⬆️
podcast_archiver/logging.py	80.00% <100.00%> (ø)
podcast_archiver/processor.py	93.26% <100.00%> (+0.13%)	⬆️

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