Embed button tests

[cesarvarela]

On top of: #3506

• adds a Netlify site that loads the script: https://aiid-embed-test.netlify.app/?embedBaseURL=https://pr-3507--staging-aiid.netlify.app
• probes that check the script is working
• minified option to load the script at /embed.min.js

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.32%. Comparing base (ef38ed2) to head (0e774d3).
Report is 24 commits behind head on staging.

Additional details and impacted files

@@           Coverage Diff            @@
##           staging    #3507   +/-   ##
========================================
  Coverage    94.32%   94.32%           
========================================
  Files           71       71           
  Lines         9080     9080           
  Branches       401      401           
========================================
  Hits          8565     8565           
- Misses         503      515   +12     
+ Partials        12        0   -12     

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