[CI/CD] Integrate Playwright E2E Suite into GitHub Actions

[BeSovereign]

Summary

Ensure that E2E tests run automatically as part of our CI/CD pipeline to prevent UI regressions.

Technical Requirements

• Workflow File: Modify .github/workflows/test.yml or create a new .github/workflows/e2e.yml.
• Environment: Ubuntu-latest.

Steps for the Agent

1. Setup Job:
   • Checkout code.
   • Install Node.js and Playwright dependencies.
   • npx playwright install --with-deps.
2. Environment Provisioning:
   • Spin up the Freeshard stack using docker-compose up -d.
   • Wait for shard_core and traefik to be healthy.
3. Execution:
   • Run npm run test:e2e inside the tests/e2e directory.
4. Artifact Handling:
   • Use actions/upload-artifact to save the playwright-report/ on failure.
   • Ensure screenshots and trace files are included.

Acceptance

• E2E tests run on every Pull Request.
• Failures in E2E tests block the PR merge.
• Trace files are downloadable from the GitHub Action summary.