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/apikeys.ts

@@ -22,5 +22,7 @@ export default {
   'apikeys.accessScope.inference': '推理接口',
   'apikeys.access.permissions': '访问权限',
   'apikeys.type.auto': '自动生成',
-  'apikeys.type.custom': '自定义'
+  'apikeys.type.custom': '自定义',
+  'apikeys.button.ipConfig': 'IP 访问控制',
+  'quotaLimits.button.title': '配额限制'
 };