structuredClone turns boxed BigInt values into plain objects

Description

The React Native structuredClone polyfill handles boxed Boolean, Number, and String values but omits boxed BigInt. structuredClone(Object(1n)) therefore returns a plain empty object that is not a BigInt wrapper and has no usable primitive value.

Expected behavior

The clone should be a distinct boxed BigInt whose valueOf() matches the input. Native structuredClone follows this behavior.

React Native Version

0.87.1 and current main

Affected Platforms

JavaScript runtime - All

首先定位 React Native 的 structuredClone polyfill，并了解 boxed Boolean、Number 和 String 值是如何处理的。为 structuredClone(Object(1n)) 添加覆盖，并验证结果是一个独立的 boxed BigInt，其 valueOf() 与输入匹配。