feat: sanetize svg files

[pi0]

Input is usually considered safe from local sources and whitelist domains but if an attacker somehow manages to bypass these, they can potentially use xss on svg files are are served as is. This enhancement tries to restrict this and make ipx secure out of the box even if a (trusted) source can contain bad data.

Try:

• Switch to branch
• Run yarn dev
• Open http://localhost:3000/_/xss.svg

[codecov[bot]]

Codecov Report

Merging #82 (50c8676) into main (13cb53d) will decrease coverage by 0.24%. The diff coverage is 16.66%.

:exclamation: Current head 50c8676 differs from pull request most recent head f2e6384. Consider uploading reports for the commit f2e6384 to get more accurate results

@@            Coverage Diff             @@
##             main      #82      +/-   ##
==========================================
- Coverage   59.17%   58.92%   -0.25%     
==========================================
  Files          10       10              
  Lines         779      784       +5     
  Branches       43       43              
==========================================
+ Hits          461      462       +1     
- Misses        318      322       +4     

Impacted Files	Coverage Δ
src/ipx.ts	81.71% <16.66%> (-1.82%)	:arrow_down:

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[pi0]

Doing it via svgo https://github.com/unjs/ipx/pull/180. xss package is really unreliable for svg sources.