When running portable stories tests with a setup file that does:

import { setProjectAnnotations } from "@storybook/web-components"

setProjectAnnotations([])

the renderToCanvas annotation is used, which is the most important bit that provides PS support for a renderer.

This issue encompasses:

• Checking how much effort it actually is to add PS support for Web Components
• Seeing how feasible are the tests (because of shadow-dom)
• Updating the storybook add postinstall script to allow installation for this renderer
• Updating docs