chore: Add codecov config

[vdusek]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.48%. Comparing base (45f56dc) to head (82273a2).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1646   +/-   ##
=======================================
  Coverage   92.48%   92.48%           
=======================================
  Files         157      157           
  Lines       10439    10439           
=======================================
  Hits         9654     9654           
  Misses        785      785           

Flag	Coverage Δ
unit	92.48% <ø> (ø)

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