`@react-native/assets` ships Flow instead of JS

Description

The assets package is shipping flow JS directly, making it break when importing on Next.js. It should build prior to publishing and remove types.

See: https://github.com/facebook/react-native/blob/main/packages/assets/registry.js

Let me know if I should PR, though I know TypeScript and not flow. Could also migrate it.

React Native Version

0.71

Output of npx react-native info

N/A

Steps to reproduce

See https://github.com/facebook/react-native/blob/main/packages/assets/registry.js

Snack, code example, screenshot, or link to a repository

If you need a repro, you can try importing @react-native/assets in Next.js. It's pretty self-explanatory though.

Thanks!

packages/assets/registry.js から始め、Next.js から @react-native/assets をインポートする処理を再現します。assets パッケージの公開およびビルド設定を追跡し、公開されたエントリが Flow 型なしのコンパイル済み JavaScript であることを確認します。Next.js からのインポートが成功すれば完了です。