Kristjan ESPERANTO 67db41cfcb refactor: rewrite NodeHelper as an ES6 class (#4147) ...

This PR rewrites `node_helper.js` to use a native ES6 `class` instead of
`Class.extend()` - a manual inheritance helper from 2008, written back
when `class` syntax didn't exist yet. Node.js has supported native
classes since v6, so there's no reason to keep the workaround around.

The public API is unchanged - module authors still write the same
`NodeHelper.create({...})` they always have.

Outcome: same behavior, normal modern JavaScript, better stack traces,
and `node_helper.js` no longer pulls in `class.js` on the server side.
Removing `class.js` altogether is a follow-up (it's still used on
browser side).

2026-05-08 19:45:47 +02:00

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