function Deno.readLink
readLink(path: string | URL): Promise<string>
Resolves to the full path destination of the named symbolic link.
```ts
await Deno.symlink("./test.txt", "./test_link.txt");
const target = await Deno.readLink("./test_link.txt"); // full path of ./test.txt
```
Throws TypeError if called with a hard link.
Requires `allow-read` permission.
Promise<string>