Tests: Add reporter configuration to visual regression config

Configure list and HTML reporters for the visual regression Playwright
config. The HTML report opens automatically on failure and outputs to
the artifacts directory.

Author: josephfusco

tests/visual-regression/playwright.config.js

@@ -15,9 +15,24 @@ process.env.STORAGE_STATE_PATH ??= path.join(
 	'storage-states/admin.json'
 );
 
+const reporter = [
+	[ 'list' ],
+	[
+		'html',
+		{
+			open: 'on-failure',
+			outputFolder: path.join(
+				process.env.WP_ARTIFACTS_PATH,
+				'visual-report'
+			),
+		},
+	],
+];
+
 const config = defineConfig( {
 	...baseConfig,
 	globalSetup: undefined,
+	reporter,
 	webServer: {
 		...baseConfig.webServer,
 		command: 'npm run env:start',