test: add Puppeteer config (#479)

Effectively this means we won't download chrome-headless-shell by
default

Author: Lightning00Blade

eslint.config.mjs

@@ -29,6 +29,7 @@ export default defineConfig([
         projectService: {
           allowDefaultProject: [
             '.prettierrc.cjs',
+            'puppeteer.config.cjs',
             'eslint.config.mjs',
             'rollup.config.mjs',
           ],

puppeteer.config.cjs

@@ -0,0 +1,20 @@
+/**
+ * @license
+ * Copyright 2025 Google Inc.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/**
+ * @type {import("puppeteer").Configuration}
+ */
+module.exports = {
+  chrome: {
+    skipDownload: false,
+  },
+  ['chrome-headless-shell']: {
+    skipDownload: true,
+  },
+  firefox: {
+    skipDownload: true,
+  },
+};