@vercel/postgres Document the use of LISTEN and NOTIFY (if at all possible).

The documentation states full compatibility with postgres, does this include LISTEN/NOTIFY?

The Neon docs mention LISTEN/NOTIFY and it works from psql so I would assume we can use them, but I see no clear way to call these commands from the SDK.

import { sql } from "@vercel/postgres"

const res = await sql`LISTEN foo`
console.log(res)
// This immediately returns
// {
//   command: "LISTEN",
//   fields: [],
//   rowAsArray: false,
//   rowCount: null,
//   rows: [],
//   viaNeonFetch: true
// }

Is this feature supported, and if so, what are the limitations.

If not, can we clarify that in the docs?

Start with the @vercel/postgres sql entry point shown in the issue and verify whether LISTEN and NOTIFY are supported through the SDK, including the behavior shown in the example. Check the Neon compatibility reference linked in the issue, then document the supported usage and limitations, or clarify that the commands are unavailable.