Add workaround for svg element tags that clash with HTML elements

[lukechu10]

Some svg tags such as a, title, script and style should now be referenced as svg_a, svg_title, svg_script and svg_style. This is to prevent name clashes with the HTML elements of the same name.

Closes #474

[codecov]

Codecov Report

Merging #479 (e407b87) into master (6aab0c2) will not change coverage.
The diff coverage is 37.50%.

@@           Coverage Diff           @@
##           master     #479   +/-   ##
=======================================
  Coverage   64.48%   64.48%           
=======================================
  Files          52       52           
  Lines        8399     8399           
=======================================
  Hits         5416     5416           
  Misses       2983     2983           

Impacted Files	Coverage Δ
packages/sycamore/src/web/html.rs	69.82% <37.50%> (ø)

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