Convert from Webpack to Vite (#34450)

Co-authored-by: Renaud Chaput <renchap@gmail.com>

vitest.config.mts

@@ -0,0 +1,26 @@
+import { configDefaults, defineConfig } from 'vitest/config';
+
+import { config as viteConfig } from './vite.config.mjs';
+
+export default defineConfig(async (context) => {
+  return {
+    ...(await viteConfig(context)),
+    test: {
+      environment: 'jsdom',
+      include: [
+        ...configDefaults.include,
+        '**/__tests__/**/*.{js,mjs,cjs,ts,mts,cts,jsx,tsx}',
+      ],
+      exclude: [
+        ...configDefaults.exclude,
+        '**/node_modules/**',
+        'vendor/**',
+        'config/**',
+        'log/**',
+        'public/**',
+        'tmp/**',
+      ],
+      globals: true,
+    },
+  };
+});