Add the Varbase E2E automated functional testing suite (1.0.x)

Problem/Motivation

The Educare theme ships no automated functional testing: no browser test proves the theme actually renders a live site — its landmarks, the Bootstrap navbar markup its preprocess hooks produce, or an interior page — so a template or hook regression only surfaces when a human loads a site. The Varbase projects and site templates run their suites on @vardot/varbase-e2e, the browser testing harness released from Vardot/varbase-e2e.

Steps to reproduce

Read the 1.0.x branch: no tests/ directory, no testing dependency, no test job in the CI configuration (the pipeline builds assets and lints only).

Proposed resolution

• Add a slim Varbase E2E suite (Playwright + Cucumber-js) proving the theme renders: front page landmarks, Bootstrap navbar markup, an interior page and the login page.
• Wire a CI test job that builds a Varbase 11 project, installs the Educare site template (which sets this theme as default) with the checked-out theme substituted in, and drives the site in the browser.
• Use only the harness's built-in steps — no custom step definitions to maintain.

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 vartheme_bs5_educare-1.0.0-alpha2

User interface changes

• N/A

API changes

• N/A

Data model changes

• N/A

Release notes snippet

• Added an automated functional testing suite on @vardot/varbase-e2e.