feat: tease enterprise multi-tenancy and API key controls in OSS

Add an Organizations menu entry (admin-only) that routes to an upsell
page explaining the multi-tenancy module, and surface disabled
IP Access Control / Quota Limit items in the API Key dropdown with a
tooltip pointing at the enterprise edition. Both placeholders are
shadowed by the enterprise plugin at build time: the route merger
removes the OSS Organizations entry by name, and the dropdown skips
each placeholder when the same key is contributed via configActions.

src/locales/zh-CN/menu.ts

@@ -38,6 +38,7 @@ export default {
   'menu.accessControl': '访问控制',
   'menu.accessControl.apikeys': 'API 密钥',
   'menu.accessControl.users': '用户',
+  'menu.accessControl.organizations': '组织',
   'menu.resources.clusters': '集群',
   'menu.resources.credentials': '云凭证',
   'menu.resources.clusterDetail': '集群详情',