Switch license to Apache 2.0

[AdrianAtZyte]

Switches the project's license to Apache License 2.0.

• Replaces the LICENSE file with the standard Apache License 2.0 text.
• Updates the license metadata (and license classifier / references where present) accordingly.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.30%. Comparing base (d634e10) to head (5d63dbb).

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #13   +/-   ##
=======================================
  Coverage   93.30%   93.30%           
=======================================
  Files          12       12           
  Lines         568      568           
  Branches      112      112           
=======================================
  Hits          530      530           
  Misses         22       22           
  Partials       16       16           

☔ View full report in Codecov by Harness.
📢 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.