Adding a Angular configuration page to the IRIS Management portal

With Intersystems indicating ZEN pages are being deprecated, I'm looking to find out how to add custom configuration pages for the management portal using the new method similar to the new Rules editor.

From what I can tell the new method uses rest pages using JWT Authentication, and has a mechanism to use the session cookie to generate the JWT token.

I've gotten the REST part done as per:

Creating a REST API with JWT Authentication in ObjectScript | InterSystems
 

The pages for the rules editor are using an obfuscated/minimised angular pages and include the following packages that handle the look, feel and authentication, but can't find these provided anywhere for use outside of InterSystems.

I'm checking if these are available anywhere. Or at least if anyone has the authentication/token handling that I could use within a custom config page.

The primary part that I couldn't follow completely was getting the token using the session cookie so I don't need an extra login for the custom config pages.

@intersystems/about-dialog
@intersystems/auth
@intersystems/column-view
@intersystems/confirmation-dialog
@intersystems/header
@intersystems/isc-form
@intersystems/notification
@intersystems/shared-utilities
@intersystems/styles
@intersystems/table
@intersystems/timeout