不支持Files白名单类型的文件导入

### Describe the bug

```ts
...
import FilesModule from '@ali/myPack/src/xxx/xxx-root';
...
```
并没有加载这个文件，而是加载了@ali/myPack里main对应的index.js

### Expected behavior

加载我指定的文件

### Actual behavior

_No response_

### Version of ice.js

3.4.0

### Content of build.json or ice.config.mts

_No response_

### Additional context

_No response_

Reproduce the issue in ice.js 3.4.0 using the shown @ali/myPack/src/xxx/xxx-root import and compare it with the package's main entry resolution. Trace the import-resolution entry point responsible for Files whitelist handling. Done means the explicitly specified file is loaded instead of @ali/myPack's main index.js.

Written by the indexing model from the issue text.