function promises.cp
Unstable
Usage in Deno
```typescript import { promises } from "node:node__fs.d.ts"; ```
cp(): Promise<void>
Asynchronously copies the entire directory structure from `src` to `dest`,
including subdirectories and files.
When copying a directory to another directory, globs are not supported and
behavior is similar to `cp dir1/ dir2/`.
Promise<void>
Fulfills with `undefined` upon success.