set up playwright component testing for a vue application using experimental-ct-vue

Steps

1. run npm init playwright@latest -- --ct to scaffold a playwright-ct.config.ts and install @playwright/experimental-ct-vue plus dependencies
2. register the Vue plugin (e.g. vue()) in the Vite config used by the component testing config, since framework plugins are not auto-detected
3. import { test, expect } from '@playwright/experimental-ct-vue' and use the mount fixture to mount a component in isolation
4. pass props, slots, and event handlers to mount() and assert on the rendered output using standard Playwright locators
5. run the component tests with the ct-specific playwright test command and inspect results in the normal HTML report