feat(state-transformer): add state-transformer package

[vitoke]

Adds @rimbu/state-transformer package

[codecov]

Codecov Report

❌ Patch coverage is 97.61905% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 94.58%. Comparing base (feb5fb7) to head (9a20d33).
⚠️ Report is 23 commits behind head on main.

Files with missing lines	Patch %	Lines
...kages/state-transformer/src/chain-transformers.mts	92.30%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #258      +/-   ##
==========================================
+ Coverage   94.57%   94.58%   +0.01%     
==========================================
  Files         261      267       +6     
  Lines       25618    25744     +126     
  Branches     6822     6858      +36     
==========================================
+ Hits        24228    24351     +123     
- Misses       1380     1383       +3     
  Partials       10       10              

☔ 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.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.