chore: Add file size PR check

[mister-ben]

Adds compressed-size-action on PRs to view the impact on file size.

[codecov]

Codecov Report

Attention: Patch coverage is 33.33333% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 82.98%. Comparing base (cb76a24) to head (ac95d65).

❗ Current head ac95d65 differs from pull request most recent head 9e676ea. Consider uploading reports for the commit 9e676ea to get more accurate results

Files	Patch %	Lines
src/js/video.js	33.33%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8714      +/-   ##
==========================================
- Coverage   83.00%   82.98%   -0.02%     
==========================================
  Files         120      120              
  Lines        7998     8001       +3     
  Branches     1927     1927              
==========================================
+ Hits         6639     6640       +1     
- Misses       1359     1361       +2     

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[mister-ben]

Will revisit another time. The action doesn't seem to be able to add a comment to a PR from a fork, so the information is buried in the actions run log.