feat: Upgrade to React 19 rc

[Artur-]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.83%. Comparing base (5a060a9) to head (51ecf09).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2565      +/-   ##
==========================================
+ Coverage   90.74%   90.83%   +0.09%     
==========================================
  Files          66       66              
  Lines        2646     2762     +116     
  Branches      526      526              
==========================================
+ Hits         2401     2509     +108     
- Misses         77       79       +2     
- Partials      168      174       +6     

Flag	Coverage Δ
unittests	90.83% <ø> (+0.09%)	⬆️

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[sonarcloud]

Quality Gate failed

Failed conditions
C Reliability Rating on New Code (required ≥ A)

See analysis details on SonarCloud

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[Artur-]

This cannot work until preact signals supports React 19 because the symbol name used for react elements has changed, see preactjs/signals#580 (comment)