Added IP address contract

Necessary to validate `ips` endpoint payloads.

RuboCop has been updated to ignore the use of `ipv4` and `ipv6` since this is a design flaw of the original API design since `version_4` or `version_6` would have been better. This'll soon be corrected (transformed) when the corresponding model is added.

Milestone: minor

.config/rubocop/config.yml

@@ -4,6 +4,9 @@ inherit_gem:
 Metrics/ParameterLists:
   Exclude:
     - lib/trmnl/api/requester.rb
+Naming/VariableNumber:
+  Exclude:
+    - lib/trmnl/api/contracts/ip_address.rb
 Style/IpAddresses:
   Exclude:
     - spec/lib/trmnl/api/types_spec.rb

lib/trmnl/api.rb

@@ -6,7 +6,7 @@ require "zeitwerk"
 Dry::Schema.load_extensions :monads
 
 Zeitwerk::Loader.new.then do |loader|
-  loader.inflector.inflect "api" => "API", "trmnl" => "TRMNL"
+  loader.inflector.inflect "api" => "API", "ip_address" => "IPAddress", "trmnl" => "TRMNL"
   loader.tag = "trmnl-api"
   loader.push_dir "#{__dir__}/.."
   loader.setup

lib/trmnl/api/container.rb

@@ -24,6 +24,7 @@ module TRMNL
         register :current_screen, Contracts::CurrentScreen
         register :display, Contracts::Display
         register :firmware, Contracts::Firmware
+        register :ip_address, Contracts::IPAddress
         register :model, Contracts::Model
         register :setup, Contracts::Setup
       end

lib/trmnl/api/contracts/ip_address.rb

@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+require "dry/schema"
+
+module TRMNL
+  module API
+    module Contracts
+      # Validates API response.
+      IPAddress = Dry::Schema.JSON do
+        required(:data).hash do
+          required(:ipv4).array(Types::IPAddress)
+          required(:ipv6).array(Types::IPAddress)
+        end
+      end
+    end
+  end
+end