chore: lint and migrate to ESLint flat config

[DamianGlowala]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 76.71%. Comparing base (660392f) to head (84e7ded).
Report is 17 commits behind head on main.

❗ Current head 84e7ded differs from pull request most recent head eb6decd. Consider uploading reports for the commit eb6decd to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #131      +/-   ##
==========================================
- Coverage   82.17%   76.71%   -5.46%     
==========================================
  Files           6        6              
  Lines         516      597      +81     
  Branches       71       82      +11     
==========================================
+ Hits          424      458      +34     
- Misses         91      136      +45     
- Partials        1        3       +2     

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[pi0]

Thanks for PR. Migrated with 57890c8