Story

Add playwright tests to the ServiceNow plugin dev pages, including a11y checks.

Background

Dependencies and Blockers

QE impacted work

Documentation impacted work

Acceptance Criteria

• Playwright tests are added to servicenow workspace, covering the plugin's dev pages
• a11y checks are added
• playwright config is exposed in the root of the workspace, and tests are runnable from the workspace root by running

  yarn playwright test 

  locally and on CI