Add CRC32C implementation

[Schamper]

This is essentially a move from dissect.btrfs to dissect.util: https://github.com/fox-it/dissect.btrfs/blob/main/dissect/btrfs/crc32c.py

Turns out that it's useful to have this more broadly available 😄.

I'll remove it from there in a future PR.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.40%. Comparing base (a2ad641) to head (2b7428f).

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #41      +/-   ##
==========================================
+ Coverage   86.30%   86.40%   +0.09%     
==========================================
  Files          18       19       +1     
  Lines        1256     1265       +9     
==========================================
+ Hits         1084     1093       +9     
  Misses        172      172              

Flag	Coverage Δ
unittests	86.40% <100.00%> (+0.09%)	⬆️

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