FEATURE: allow wizard checkbox field to be disabled (#17916)

* FEATURE: allow wizard checkbox field to be disabled

* Changes per review feedback

app/serializers/wizard_field_serializer.rb

@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 class WizardFieldSerializer < ApplicationSerializer
-  attributes :id, :type, :required, :value, :label, :placeholder, :description, :extra_description, :icon, :show_in_sidebar
+  attributes :id, :type, :required, :value, :label, :placeholder, :description, :extra_description, :icon, :disabled, :show_in_sidebar
   has_many :choices, serializer: WizardFieldChoiceSerializer, embed: :objects
 
   def id
@@ -75,6 +75,14 @@ class WizardFieldSerializer < ApplicationSerializer
     object.icon.present?
   end
 
+  def disabled
+    object.disabled
+  end
+
+  def include_disabled?
+    object.disabled
+  end
+
   def show_in_sidebar
     object.show_in_sidebar
   end