chore: add CLAUDE.md

[sebastijankuzner]

Summary

Checklist

• Ready to be merged

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 56.35%. Comparing base (6644fe2) to head (34befd3).

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1306      +/-   ##
===========================================
+ Coverage    56.06%   56.35%   +0.28%     
===========================================
  Files          966      970       +4     
  Lines        64240    64684     +444     
  Branches      1571     1653      +82     
===========================================
+ Hits         36016    36450     +434     
- Misses       27993    28001       +8     
- Partials       231      233       +2     

Flag	Coverage Δ
contracts	97.74% <ø> (?)
packages	56.06% <ø> (ø)

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