Make templates for Django authentication views

[AdrianDAlessandro]

Is your feature request related to a problem? Please describe.
Users need to be able to create an account and log in (see User story: RSEToolkit/rse-competencies-toolkit#111)

Describe the solution you'd like
Django provides an authentication system, there are various built-in views related to user account actions. To be enabled, they require the following:

• Add django.contrib.auth.urls to urls
• Add all required templates to the main/templates/registration/ directory (the default location for the templates used by the in-built views):
  • registration/login.html
  • registration/logged_out.html
  • registration/password_change_form.html
  • registration/password_change_done.html
  • registration/password_reset_form.html - this PasswordResetView seems to have some extra template options related to emailing the user.
  • registration/password_reset_done.html
  • registration/password_reset_confirm.html
  • registration/password_reset_complete.html