ci(release): drop prepublishOnly hook + ignore-scripts on main publish

The root cause of the previous failure was the package.json
"prepublishOnly": "napi prepublish -t npm" script. When the workflow
ran `npm publish` for the main wickra package it implicitly invoked
that hook, which re-attempted to publish every platform subpackage and
hit 403 "cannot publish over 0.1.2" because they were already on
the registry. The error trail looked like it came from the main
publish step but the failing command was actually the hook.

Two-part fix:
- Remove prepublishOnly entirely from bindings/node/package.json. The
  release workflow already does the per-platform publish itself, in a
  loop, idempotently.
- Belt-and-braces: pass --ignore-scripts when publishing the main
  package so any prepublish-hook drift in the future is suppressed.

bindings/node/package.json

@@ -54,7 +54,6 @@
     "build": "napi build --platform --release",
     "build:debug": "napi build --platform",
     "artifacts": "napi artifacts",
-    "prepublishOnly": "napi prepublish -t npm",
     "universal": "napi universal",
     "version": "napi version",
     "test": "node --test __tests__/"