[Sriram-Nambiar]

Fixes CSS string serialization where escaped Unicode characters (e.g. \e123) were converted into literal characters during rewriting.

• Preserve CSS escapes when serializing StringToken nodes.
• Handle unterminated strings without modifying their original representation.

Fixes #376

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (4cbfe83) to head (4f45fcf).

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #377   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           42        42           
  Lines         2867      2900   +33     
  Branches       432       443   +11     
=========================================
+ Hits          2867      2900   +33     

☔ View full report in Codecov by Harness.
📢 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.