Add new app 'help' for user support

This commit adds a new model that enhances the user profile with an
offline support code, a postal address and an email address to allow
users to reset their profile.

The commit adds to Django admin commands 'populate' and
'reset_offline_code' to maintain the help user profiles from the Django
command line.

gnuviechadmin/help/apps.py

@@ -0,0 +1,8 @@
+from django.apps import AppConfig
+from django.utils.translation import gettext_lazy as _
+
+
+class HelpConfig(AppConfig):
+    default_auto_field = "django.db.models.BigAutoField"
+    name = "help"
+    verbose_name = _("User self help")