Feat/wheel proj

[tmi]

Enable proj, fix import paths

🌦️ >> Documentation << 🌦️
https://sites.ecmwf.int/docs/dev-section/eckit/pull-requests/PR-323

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 67.52%. Comparing base (1468cc3) to head (ce229a3).
⚠️ Report is 423 commits behind head on feature/eckit-geo.

Additional details and impacted files

@@                  Coverage Diff                  @@
##           feature/eckit-geo     #323      +/-   ##
=====================================================
+ Coverage              66.68%   67.52%   +0.84%     
=====================================================
  Files                   1123     1182      +59     
  Lines                  57983    61623    +3640     
  Branches                4423     4659     +236     
=====================================================
+ Hits                   38664    41611    +2947     
- Misses                 19319    20012     +693     

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