[error-utils] Create @vercel/error-utils package (#8828)

While working on #8742 i found some useful error checking code buried in
the CLI. This PR adds a new private package `@vercel/errors` that moves
those helpful utilities into its own package so it can be used
throughout the monorepo.

packages/cli/src/util/dev/server.ts

@@ -94,7 +94,7 @@ import {
   isErrnoException,
   isError,
   isSpawnError,
-} from '../is-error';
+} from '@vercel/error-utils';
 import isURL from './is-url';
 import { pickOverrides } from '../projects/project-settings';
 import { replaceLocalhost } from './parse-listen';