Implement State type.

[michakraus]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 86.00000% with 7 lines in your changes missing coverage. Please review.
✅ Project coverage is 80.41%. Comparing base (fed90c8) to head (b84fca9).
⚠️ Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
src/data/state.jl	85.71%	7 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main       #9      +/-   ##
==========================================
+ Coverage   78.39%   80.41%   +2.01%     
==========================================
  Files          18       19       +1     
  Lines         287      337      +50     
==========================================
+ Hits          225      271      +46     
- Misses         62       66       +4     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.