feat: add npm registry configuration

This commit introduces a new npm registry configuration file and updates the prepare script to support npm package publishing.

The new `includes/nodejs/registry.yml` file defines variables and a job for publishing npm packages to the GitLab package registry. It allows specifying the npm registry scope and configures the `.npmrc` file with the necessary authentication token.

The `includes/prepare.yml` file is updated to configure the npm registry for both `octolize` and `wpdesk` scopes, ensuring that npm packages can be properly installed and published