docs: add info about dependencies to install

docs/1.getting-started/11.testing.md

@@ -508,7 +508,22 @@ const page = await createPage('/page')
 
 #### Testing with Playwright Test Runner
 
-We also provide first-class support for using `@nuxt/test-utils` within [the Playwright test runner](https://playwright.dev/docs/intro).
+We also provide first-class support for testing Nuxt within [the Playwright test runner](https://playwright.dev/docs/intro).
+
+::code-group
+```bash [yarn]
+yarn add --dev @playwright/test @nuxt/test-utils
+```
+```bash [npm]
+npm i --save-dev @playwright/test @nuxt/test-utils
+```
+```bash [pnpm]
+pnpm add -D @playwright/test @nuxt/test-utils
+```
+```bash [bun]
+bun add --dev @playwright/test @nuxt/test-utils
+```
+::
 
 You can provide global Nuxt configuration, with the same configuration details as the `setup()` function mentioned earlier in this section.