test(integration): create a integration test with LWC component(s)

[mohanraj-r]

Create barebones LWC components from the public OSS packages and

• Verify that for non-accessible components appropriate a11y issues are thrown
• Verify that accessible components throw no a11y error
• Put the component in its various possible states (e.g. expanded etc) and check for a11y
  • Use for doc/illustration