Issue #3509582: Move pfrenssen/matomo-reporting-api library code into module
- Integrated all library classes into src/MatomoApi/
- Updated namespaces from Matomo\ReportingApi to Drupal\matomo_reporting_api\MatomoApi
- Removed composer dependency on pfrenssen/matomo-reporting-api
- Imported and adapted HttpClient unit test
- Fixed ConfigHandler::matomoSettingsInherited() return type issue
- All tests passing (93 tests, 207 assertions)
Co-Authored-By: Claude noreply@anthropic.com
Closes #3509582