2FA Implementation

[LorenzoGrama]

I'm starting this discussion because me @yakky and @gamboz plan to introduce 2FA in our SISSA project. We would like to integrate this functionality directly into Janeway using the django-two-factor-auth library for core features. Additionally, we plan to add a configuration setting that allows us to enable or disable 2FA as needed.

Before submitting a merge request, please let us know if you have any concerns, additional requirements, or suggestions regarding this integration.

Thank you for your feedback!

[ajrbyers]

Thanks for submitting this - I've previously used django-two-factor-auth and found it works very well. It would be good to see a core implementation for this.