Update /dom/use to prefer href attribute with xlink namespace fallback

[MaelRB]

Update the /dom/use tag to lookup for standalone href attribute and fallback to the xlink:href attribute for backward compatibility following the W3C specification.

[swhitty]

thank you 🙏🏻

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.80%. Comparing base (a5da29f) to head (28e7041).
⚠️ Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #136      +/-   ##
==========================================
+ Coverage   88.78%   88.80%   +0.01%     
==========================================
  Files         166      166              
  Lines       13311    13332      +21     
==========================================
+ Hits        11818    11839      +21     
  Misses       1493     1493              

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