Support non_null(list_of()) and :id

[kirega]

Adds support for the request in #6

• Adds support for the id type.
• Adds support for the curious case of non_null(list_of()) raising the following error

Invalid constraints for field/arg `id` of type `%Absinthe.Blueprint.TypeReference.NonNull{of_type: %Absinthe.Blueprint.TypeReference.List{of_type: :string, errors: []}, errors: []}`: [:format]


    (absinthe_constraints 0.2.0) lib/absinthe_constraints/directive.ex:72: AbsintheConstraints.Directive.handle_invalid_args/2
    (absinthe_constraints 0.2.0) lib/absinthe_constraints/directive.ex:61: AbsintheConstraints.Directive.do_expand/3
    (elixir 1.16.1) lib/enum.ex:2528: Enum."-reduce/3-lists^foldl/2-0-"/3
    (absinthe 1.7.6) lib/absinthe/blueprint/transform.ex:16: anonymous fn/3 in Absinthe.Blueprint.Transform.prewalk/2
    (absinthe 1.7.6) lib/absinthe/blueprint/transform.ex:117: Absinthe.Blueprint.Transform.walk/4
    (elixir 1.16.1) lib/enum.ex:1826: Enum."-map_reduce/3-lists^mapfoldl/2-0-"/3
    (absinthe 1.7.6) lib/absinthe/blueprint/transform.ex:147: anonymous fn/4 in Absinthe.Blueprint.Transform.walk_children/5
    (elixir 1.16.1) lib/enum.ex:2528: Enum."-reduce/3-lists^foldl/2-0-"/3
    (absinthe 1.7.6) lib/absinthe/blueprint/transform.ex:122: Absinthe.Blueprint.Transform.walk/4
    (elixir 1.16.1) lib/enum.ex:1826: Enum."-map_reduce/3-lists^mapfoldl/2-0-"/3
    (elixir 1.16.1) lib/enum.ex:1826: Enum."-map_reduce/3-lists^mapfoldl/2-0-"/3
    (absinthe 1.7.6) lib/absinthe/blueprint/transform.ex:147: anonymous fn/4 in Absinthe.Blueprint.Transform.walk_children/5
    (elixir 1.16.1) lib/enum.ex:2528: Enum."-reduce/3-lists^foldl/2-0-"/3
    (absinthe 1.7.6) lib/absinthe/blueprint/transform.ex:122: Absinthe.Blueprint.Transform.walk/4
    (elixir 1.16.1) lib/enum.ex:1826: Enum."-map_reduce/3-lists^mapfoldl/2-0-"/3
    (elixir 1.16.1) lib/enum.ex:1826: Enum."-map_reduce/3-lists^mapfoldl/2-0-"/3
    (absinthe 1.7.6) lib/absinthe/blueprint/transform.ex:147: anonymous fn/4 in Absinthe.Blueprint.Transform.walk_children/5
    (elixir 1.16.1) lib/enum.ex:2528: Enum."-reduce/3-lists^foldl/2-0-"/3
    (absinthe 1.7.6) lib/absinthe/blueprint/transform.ex:122: Absinthe.Blueprint.Transform.walk/4
    (elixir 1.16.1) lib/enum.ex:1826: Enum."-map_reduce/3-lists^mapfoldl/2-0-"/3

Looking forward to your reviews and more tests scenarios to consider.

Thanks