feat: Add --dry-run option

[janw]

No description provided.

[codecov]

Codecov Report

Attention: 9 lines in your changes are missing coverage. Please review.

Comparison is base (2965697) 90.53% compared to head (b9c5aad) 89.64%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #79      +/-   ##
==========================================
- Coverage   90.53%   89.64%   -0.89%     
==========================================
  Files          15       15              
  Lines         676      705      +29     
  Branches      119      124       +5     
==========================================
+ Hits          612      632      +20     
- Misses         43       48       +5     
- Partials       21       25       +4     

Files	Coverage Δ
podcast_archiver/cli.py	81.39% <100.00%> (+0.21%)	⬆️
podcast_archiver/config.py	93.24% <100.00%> (+0.09%)	⬆️
podcast_archiver/processor.py	84.61% <100.00%> (-0.20%)	⬇️
podcast_archiver/console.py	84.00% <83.33%> (-16.00%)	⬇️
podcast_archiver/download.py	88.23% <28.57%> (-4.55%)	⬇️

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