fix: add tsconfig.json for playwright tests

1. Avoid "The file must be included in at least one of the projects
provided" error when using type-aware ESLint configurations;
2. It's recommended by the [playwright documentation](https://playwright.dev/docs/test-typescript#tsconfigjson):
> We recommend setting up a separate `tsconfig.json` in the tests
directory so that you can change some preferences specifically for the
tests.

index.ts

@@ -336,6 +336,9 @@ async function init() {
     if (needsCypressCT) {
       render('tsconfig/cypress-ct')
     }
+    if (needsPlaywright) {
+      render('tsconfig/playwright')
+    }
     if (needsVitest) {
       render('tsconfig/vitest')
     }

template/tsconfig/playwright/e2e/tsconfig.json

@@ -0,0 +1,4 @@
+{
+  "extends": "@vue/tsconfig/tsconfig.node.json",
+  "include": ["./**/*"]
+}