Create Seeds Script to Create Default Roles and Permissions

[nelsonic]

As noted in #82 (comment) we have 7 default roles:

id	name	desc	person_id
1	superadmin	Can CREATE new roles. Can CREATE, UPDATE and DELETE Any content. Can PURGE deleted items. Can "ban" any user including people with "Admin" Role.	1
2	admin	Can create new roles and assign existing roles. Can CREATE, UPDATE and DELETE any content. Can "ban" any user except people with "admin" Role. Can see deleted content and un-delete it. Cannot purge deleted. This guarantees audit-trail.	1
3	editor	Can CREATE and UPDATE Any content. Can "DELETE" content. Cannot see deleted content.	1
4	creator	Can CREATE content. Can UPDATE their own content. Can DELETE their own content.	1
5	commenter	Can COMMENT on content that has commenting enabled.	1
6	subscriber	Can SUBSCRIBE to receive updates (e.g: newsletter), but has either not verified their account or has made negative comments and is therefore not allowed to comment.	1
7	banned	Can login and see their past content. Cannot create any new content. Can see the reason for their banning (which the Admin has to write when performing the "ban user" action. usually linked to a specific action the person performed like a particularly unacceptable comment.)	1

Todo

• write a script to create both the roles and permissions during mix ecto.setup.
• Create all default roles + permissions, inspired by: https://wordpress.org/support/article/roles-and-capabilities
• Create all default roles

I expect this task to take a couple of hours.
But I'm going to install Wordpress on my localhost first and view how they have setup the permissions.
Related to #27 / #31

[nelsonic]

Default roles created:

[nelsonic]

Created in #85 > https://github.com/dwyl/auth/blob/master/priv/repo/default_roles.json ✅