fix: nitro server cors support with cookie (#5549)

* 修复nitro server在使用cookie时的跨域配置

apps/backend-mock/middleware/1.api.ts

@@ -1,4 +1,8 @@
 export default defineEventHandler((event) => {
+  event.node.res.setHeader(
+    'Access-Control-Allow-Origin',
+    event.headers.get('Origin') ?? '*',
+  );
   if (event.method === 'OPTIONS') {
     event.node.res.statusCode = 204;
     event.node.res.statusMessage = 'No Content.';