chore: Add license header to source files

[crandmck]

Changes in this pull request

Add comments to the top of all source files with standard license terms. This is required by the Adobe Open Source office.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• All applicable changes have been documented
• Any TO DO items (or similar) have been entered as GitHub issues and the link to that issue has been included in a comment

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 52.07%. Comparing base (4f99ab6) to head (3e1af80).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #11   +/-   ##
=======================================
  Coverage   52.07%   52.07%           
=======================================
  Files          13       13           
  Lines         797      797           
  Branches      116      116           
=======================================
  Hits          415      415           
  Misses        309      309           
  Partials       73       73           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.