feat: Add AutoOneToOneField to users fields

[IMperiumX]

The code changes introduce one new fields, AutoOneToOneField, to the users module. This fields is subclasses of OneToOneField, which Creates a related object on first call if it doesn't exist yet.

[github-actions[bot]]

This PR has a migration; here is the generated SQL for aura/users/migrations/0007_alter_coach_date_of_birth_and_more.py aura/users/migrations/0008_alter_user_email.py ()

BEGIN;
--
-- Alter field email on user
--
ALTER TABLE "users_user" ALTER COLUMN "email" TYPE varchar(100);
COMMIT;