Add GS1CompanyPrefix support

[jodal]

This PR adds the initial parts of GS1 Company Prefix support:

• A script to parse GS1's XML data set and build a trie data structure to look
  up the Company Prefix lengths.
• Decompressing and loading of the Company Prefix trie on import of Biip.
• A GS1CompanyPrefix class to extract the Company Prefix length from any value.

Part of #160

[codecov]

Codecov Report

Base: 100.00% // Head: 100.00% // No change to project coverage 👍

Coverage data is based on head (ed698a2) compared to base (76ef365).
Patch coverage: 100.00% of modified lines in pull request are covered.

❗ Current head ed698a2 differs from pull request most recent head 6f6c459. Consider uploading reports for the commit 6f6c459 to get more accurate results

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #172   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           18        18           
  Lines          886       911   +25     
  Branches       138       146    +8     
=========================================
+ Hits           886       911   +25     

Impacted Files	Coverage Δ
src/biip/gs1/__init__.py	100.00% <100.00%> (ø)
src/biip/gs1/_prefixes.py	100.00% <100.00%> (ø)

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