Add a feature for user profile

[sameershaik-coder]

Add a page for user profile, this must go under app - Accounts Use below model under accounts/model : UserProfile(models.Model)

1. if the profile is not created or does not exist, display empty form to user, allow user to add profile info and save it to DB
2. if the profile already exists, display existing data to user and allow user to edit his profile details
3. Do not allow user to create/edit subscription_type
4. Create unit tests for all above code with 100% coverage