We recently added team names to the `focus: ...` labels:
https://github.com/woocommerce/woocommerce/labels?q=focus
The PR labeler relies on exact label names, however. This PR updates the PR labeler to conform to the new string.
In order to ease the identification of private packages within the monorepo, this adds an `internal-` prefix to all of the current private packages. This makes it immediately clear when reviewing `packages/js` what is and isn't a private package.