chore: Revive Livechat Storybook (#33137)

Author: MartinSchoeler

packages/livechat/.storybook/main.ts

@@ -30,7 +30,7 @@ const config: StorybookConfig = {
 			[require.resolve('../src/lib/uiKit')]: require.resolve('./mocks/uiKit.ts'),
 		};
 
-		const isRuleSetRule = (rule: any): rule is RuleSetRule => typeof rule === 'object' && rule.test && rule.use;
+		const isRuleSetRule = (rule: any): rule is RuleSetRule => typeof rule === 'object';
 
 		config.module.rules ??= [];
 
@@ -54,6 +54,15 @@ const config: StorybookConfig = {
 		}
 		urlLoader.test = /\.(webm|wav|m4a|aac|oga)(\?.*)?$/;
 
+		config.module.rules.push({
+			test: /\.mjs$/,
+			include: /node_modules/,
+			type: 'javascript/auto',
+			use: {
+				loader: require.resolve('babel-loader'),
+			},
+		});
+
 		config.module.rules.push({
 			test: /\.scss$/,
 			use: [