fix: Rewrite CSS style attributes in SVG

[martinthomson]

This makes the dark mode work properly for drafts like https://datatracker.ietf.org/doc/html/draft-hajdusek-qirg-timing-physics-01 which have diagrams that use a mix of ordinary attributes and the style attribute. Using the style attribute makes the rules there invisible to the method we use for the remapping of black and white for dark mode.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.36%. Comparing base (76fd25a) to head (989ce2a).
⚠️ Report is 19 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #10584   +/-   ##
=======================================
  Coverage   88.36%   88.36%           
=======================================
  Files         327      327           
  Lines       44092    44092           
=======================================
  Hits        38964    38964           
  Misses       5128     5128           

☔ 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.