Document how to access a local service through "localhost"

Accessing localhost depends on where the apps is running:

• iOS Simulator -> can access localhost/127.0.0.1
• Android emulator -> needs to use a special IP, often 10.2.2.0 (todo: fact-check and list common ips to try)
• iOS Device -> needs to access an address accessible on the local network like 192.168.0.x or similar
• Androud device -> same as iOS device.

Mention that cleartext traffic is blocked by default (silently), so http or ws requests will not work unless you specifically allow cleartext traffic:

Android:

<application
 <!-- ... -->
 android:usesCleartextTraffic="true"
 <!-- ... -->
</application>

ios?

首先找到介绍本地服务或网络通信的 NativeScript 文档页面。验证 localhost 的行为以及 iOS 和 Android 常见的模拟器/设备地址，然后记录 cleartext-traffic 的要求，包括缺失的 iOS 指南。完成的标准是该页面涵盖列表中的每个环境，并提供准确的地址和设置说明。