[Feature Request] Require Display Name as Input; Don't require Name

[golanglemonade]

Summary

The Name field is (and should remain) unique, but we don't necessarily want to require the user to set it.
The Display Name is what the user should enter as input, and it is not required to be unique in our system.

Part 1:

The schema should be updated to be Optional() and NotEmpty() for both fields, e.g.:

Updated Organization Schema:

			Comment("the name of the organization").
			MaxLen(orgNameMaxLen).
                         ++ Optional().
			NotEmpty().
			Annotations(
				entgql.OrderField("name"),
				entgql.Skip(entgql.SkipWhereInput),
			),
		field.String("display_name").
			Comment("The organization's displayed 'friendly' name").
			MaxLen(nameMaxLen).
                        ++  Optional().
		       ++ NotEmpty().
			Annotations(
				entgql.OrderField("display_name"),
			),

Part 2

If the Name isn't provided, we should come up with a good format so that it remains human readable + unique.