Convert playwright.config.js to ES module syntax

gradesa/playwright.config.js

@@ -1,10 +1,10 @@
 // @ts-check
-const { defineConfig, devices } = require("@playwright/test");
+import { defineConfig, devices } from "@playwright/test";
 
 /**
  * @see https://playwright.dev/docs/test-configuration
  */
-module.exports = defineConfig({
+export default defineConfig({
   testDir: "./playwright/e2e",
   fullyParallel: true,
   forbidOnly: !!process.env.CI,