[Feature Request] 请求适配 UniApp 鸿蒙（HarmonyOS）应用

### 功能请求 / Feature Request

**需求描述**
We hope that the Agora-Uniapp-SDK will support compiling UniApp applications for HarmonyOS NEXT.
希望 Agora-Uniapp-SDK 能够支持 UniApp 编译到鸿蒙（HarmonyOS NEXT）应用。

**背景说明**
- UniApp now supports compiling to HarmonyOS applications.
- UniApp 已支持编译到鸿蒙应用
- Currently, the SDK only supports Android and iOS platforms.
- 目前 SDK 仅支持 Android 和 iOS 平台
- The HarmonyOS ecosystem is developing rapidly in the country, and there is a large demand for it among developers.
- 鸿蒙生态在国内快速发展，有大量开发者有此需求

**使用场景**
- We need to implement audio and video live streaming on HarmonyOS devices.
- 需要在鸿蒙设备上实现音视频直播
- The existing UniApp project needs to support Android, iOS, and HarmonyOS platforms simultaneously.
- 现有 UniApp 项目需要同时支持 Android、iOS、鸿蒙三端

**期望的解决方案**
- Added support for native plugins in HarmonyOS NEXT.
- 增加对 HarmonyOS NEXT 的原生插件支持
- HarmonyOS compilation mode compatible with UniApp
- 兼容 UniApp 的鸿蒙编译模式