- Add types for scope, action, resource_permission, permission_set
- Implement get_permissions/1 for all 4 sets (own_data, read_only, normal_user, admin)
- Implement valid_permission_set?/1 for string and atom validation
- Implement permission_set_name_to_atom/1 with error handling
Remove is_system_role from accept lists in create_role and update_role
actions. This field should only be set via seeds or internal actions to
prevent users from creating unkillable roles through the public API.
Create Role resource with name, description, permission_set_name,
and is_system_role fields. Add validations for permission_set_name
and system role deletion protection.
