Added recipe author model

Necessary to model a recipe author. A `Struct` is used because some keys are optional. This injects the `LocaleReducer` in order to convert all description locales to a hash for quick lookup rather than use the redundant keys provided by the API. Will soon be used by the recipe model (soon to be added).

Milestone: minor

lib/trmnl/api/models/recipes/author.rb

@@ -0,0 +1,28 @@
+# frozen_string_literal: true
+
+module TRMNL
+  module API
+    module Models
+      module Recipes
+        # Models the author of the API response.
+        Author = Struct.new(
+          :keyname,
+          :name,
+          :field_type,
+          :category,
+          :description,
+          :description_locales,
+          :email_address,
+          :learn_more_url,
+          :github_url,
+          :youtube_url
+        ) do
+          def self.for(locale_reducer: LocaleReducer, **attributes)
+            description_locales = locale_reducer.call attributes
+            new(description_locales:, **attributes)
+          end
+        end
+      end
+    end
+  end
+end

spec/lib/trmnl/api/models/recipes/author_spec.rb

@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+require "spec_helper"
+
+RSpec.describe TRMNL::API::Models::Recipes::Author do
+  subject(:author) { described_class.new }
+
+  describe ".for" do
+    let :attributes do
+      {
+        name: "test",
+        "description-de": "german",
+        "description-nl": "dutch",
+        "description-fr": "french"
+      }
+    end
+
+    it "transforms description locales to hash by key only" do
+      expect(described_class.for(**attributes)).to eq(
+        described_class[
+          name: "test",
+          description_locales: {
+            "de" => "german",
+            "nl" => "dutch",
+            "fr" => "french"
+          }
+        ]
+      )
+    end
+  end
+end