Create Config files for Development environment

[shashank-sharma]

For example there are few actions which gets triggered, like sending mail when new user is created in justicehub
Ideally we don't want this to happen in local environment and should be easily configurable

Example: https://github.com/justicehub-in/ckanext-emailauth/blob/main/ckanext/emailauth/controllers/mail_validation_controller.py#L251