vite 构建的 ts 项目中，引用某些库时，遇到 Could not find a declaration file for module 的错误提示。手动在 env.d.ts 中添加一下就可以。如：
/// <reference types="vite/client" />
declare module 'element-plus/dist/locale/zh-cn.mjs'
declare module 'element-plus/dist/locale/en.mjs'
declare module 'element-plus/dist/locale/ja.mjs'
declare module 'simple-peer/simplepeer.min.js'