Bindings to React modules are incompatible with node ESM

hello 👋

great work on the release!

I just found out that the new bindings, omitting the .js extension break when using node in ESM mode, as it tries to resolve to .mjs when unspecified. It currently breaks ReScript Pages (https://github.com/bloodyowl/rescript-pages/tree/upgrade-rescript-react) at runtime with the following error:

Error [ERR_MODULE_NOT_FOUND]: Cannot find module '/Volumes/Dev/bloodyowl/rescript-pages/node_modules/react/jsx-runtime' imported from /Volumes/Dev/bloodyowl/rescript-pages/src/PagesServer.mjs
Did you mean to import react/jsx-runtime.js?
    at new NodeError (node:internal/errors:393:5)
    at finalizeResolution (node:internal/modules/esm/resolve:305:11)
    at moduleResolve (node:internal/modules/esm/resolve:866:10)
    at defaultResolve (node:internal/modules/esm/resolve:1074:11)
    at nextResolve (node:internal/modules/esm/loader:164:28)
    at ESMLoader.resolve (node:internal/modules/esm/loader:839:30)
    at ESMLoader.getModuleJob (node:internal/modules/esm/loader:426:18)
    at ModuleWrap.<anonymous> (node:internal/modules/esm/module_job:76:40)
    at link (node:internal/modules/esm/module_job:75:36) {
  code: 'ERR_MODULE_NOT_FOUND'
}

and will most likely break any project in this configuration.

would you consider a PR adding the extensions back into the declarations?

使用报告中链接的 ReScript Pages 升级重现该失败，并检查 src/PagesServer.mjs 中生成的 react/jsx-runtime import。追踪 React 模块声明的生成位置，并在 Node ESM 下验证生成的 imports。生成的 bindings 能够在运行时解析且不会出现 ERR_MODULE_NOT_FOUND，即表示完成。