Add -l/--log-directory option to add logs directory to WACZ

[tw4l]

Connected to #28

This commit additionally formats a few modules with Black to prevent the linter from complaining.

[codecov]

Codecov Report

Merging #29 (219b596) into main (8543b3b) will increase coverage by 0.30%.
The diff coverage is 100.00%.

❗ Current head 219b596 differs from pull request most recent head 23e11a4. Consider uploading reports for the commit 23e11a4 to get more accurate results

@@            Coverage Diff             @@
##             main      #29      +/-   ##
==========================================
+ Coverage   81.50%   81.80%   +0.30%     
==========================================
  Files           4        4              
  Lines         665      676      +11     
  Branches      144      148       +4     
==========================================
+ Hits          542      553      +11     
  Misses         79       79              
  Partials       44       44              

Impacted Files	Coverage Δ
wacz/waczindexer.py	82.70% <ø> (ø)
wacz/main.py	88.95% <100.00%> (+0.75%)	⬆️

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[ikreymer]

Looks good! I wonder if, just to be extra safe, its worth adding a second log file to the tests?
Or maybe not needed..

[tw4l]

Sure I can do that quickly!