@jefero
We don't have an example for integrating the Mango dashboards components into an app, however you should be able to leverage the Angular modules which are in the MA_HOME/web/modules/dashboards/web/js/mango-3.3 folder. I'd suggest looking at the adminTemplate/app.js file to see how to bootstrap the Angular application.
The login procedure is cookie based at the moment so its not ideal for integrating into an app. We will be implementing JSON Web Token authentication for the REST API in the next release.