[Bug]: Fluttter 3.29.3 FlutterMain

### 请描述遇到的问题，以及您所期望的正确的结果

升级 3.29.3 找不到类库

### 请说明如何操作会遇到上述问题

_No response_

### 在下面填入关键复现代码

```
```

### 复现的平台

Both

### Flutter SDK版本

3.29.3

### FlutterBoost版本

5.0.2

### 是否延迟初始化FlutterBoost

No

### 解决方案

增加适配3.29.3 分支 tag

Start by checking FlutterBoost 5.0.2 compatibility with Flutter SDK 3.29.3 and the existing release or tag conventions; the issue reports a missing library around FlutterMain on both platforms. Reproduce the failure on Flutter 3.29.3, then verify that the resulting compatibility branch or tag makes the library available.

Written by the indexing model from the issue text.