feat: Add @wxt-dev/module-svelte package

[aklinker1]

Follow up to #716. Still need to do Solid and React. React will be the difficult one.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.28%. Comparing base (48783ba) to head (c223add).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #726      +/-   ##
==========================================
- Coverage   87.55%   87.28%   -0.27%     
==========================================
  Files         115      115              
  Lines        9681     9681              
  Branches      962      960       -2     
==========================================
- Hits         8476     8450      -26     
- Misses       1192     1218      +26     
  Partials       13       13              

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