Make WPJM's CPTs more accessible for page builders?

A user in [this forums thread](https://wordpress.org/support/topic/dynamic-fields-from-wp-job-into-elementor-or-page-builder) wants to create custom listing pages using a page builder like [Elementor](https://wordpress.org/plugins/elementor/). However, they note that while Elementor has the ability to "bring dynamic data through", WPJM's custom fields seem to be inaccessible.

Elementor support has advised that everything needs to be set to `(‘public’ => true)` and `has_archive` should also be set to `true`. They cite this documentation:

https://elementor.com/blog/wordpress-custom-post-types/

Elementor support recommended we [contact them directly on GitHub](https://github.com/pojome) to work out compatibility, if this is something we'd like to pick up in the future.

Inspect WP Job Manager's custom post type registration and compare its public and archive settings with Elementor's custom post type guidance and the linked support thread. Confirm the desired compatibility with Elementor or another page builder, then define and test the behavior that lets dynamic WPJM fields be used in custom listing pages.

Written by the indexing model from the issue text.