Switch the Educare functional testing suite to Varbase E2E (1.0.x)

Problem/Motivation

The Educare functional testing suite still installs the browser testing package the suite was originally built on. That package is no longer the one Vardot maintains: the harness now ships as @vardot/varbase-e2e on npm, released from Vardot/varbase-e2e, and every other Varbase project has moved to it.

Leaving Educare on the old package means the site template stops receiving the step-definition fixes and the Drupal-aware steps that land in Varbase E2E.

Steps to reproduce

Read package.json, cucumber.js and tests/step-definitions/ on the 1.0.x branch: the dependency, the step-definition require paths and the documentation all name the old package.

Proposed resolution

• Depend on @vardot/varbase-e2e and load its step definitions in cucumber.js.
• Point the report generator at the new package path.
• Rename the world parameter environment variables to the VARBASE_E2E_ prefix.
• Update the suite documentation, the spelling dictionary and the ignore rules to match.

Remaining tasks

• ✅ File an issue
• ❌ Addition/Change/Update/Fix
• ➖ Testing to ensure no regression
• ➖ Automated unit testing coverage
• ❌ Automated functional testing coverage
• ➖ UX/UI designer responsibilities
• ➖ Readability
• ➖ Accessibility
• ➖ Performance
• ➖ Security
• ❌ Developer Documentation
• ➖ User Guide Documentation
• ❌ Reviewed by human
• ❌ Code review by maintainers
• ➖ Full testing and approval
• ➖ Credit contributors
• ➖ Review with the product owner
• ❌ Release notes snippet
• ✅ Release educare-1.0.0-alpha2

User interface changes

• N/A

API changes

• N/A

Data model changes

• N/A

Release notes snippet

• The functional testing suite now runs on @vardot/varbase-e2e.