Can't install in an expo snack: Invalid module ../assets/images/LeftArrow.png

Reproduction: https://snack.expo.dev/@matthieugc/blissful-blue-marshmallows

```
Failed to resolve dependency '@bam.tech/react-native-screen-sizer@0.3.0' (Invalid module ../assets/images/LeftArrow.png - Module not found: Error: Can't resolve '../assets/images/LeftArrow.png' in '/tmp/snackager/snackager/buildStatus/1/@bam.tech~react-native-screen-sizer@0.3.0-ios,android,web/package/lib/module')
```

It seems like snack uses the "module" field in package.json (pointing to `./lib/module`) as an entrypoint (not the "react-native" field pointing to (`./src`), and since there's one more folder level, the assets path is invalid (should be "../../" instead of "../")

Inspect package.json and the published lib/module entrypoint, then compare the asset reference to the source path under src. Reproduce the install in the linked Expo Snack and verify that LeftArrow.png resolves successfully when the package is installed.

Scritto dal modello di indicizzazione a partire dal testo della issue.