Support for the Svelte 5 env.

[shimkiv]

• Svelte 5 support;
• Tests;
• Changelog.

---

Closes #700

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (8cdcac3) to head (7d2602d).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #701   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           11        11           
  Lines         1475      1475           
  Branches       300       300           
=========================================
  Hits          1475      1475           

Flag	Coverage Δ
unittests	100.00% <100.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

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

[shimkiv]

Nightly workflow execution results for this branch: https://github.com/o1-labs/zkapp-cli/actions/runs/11479567429