Add and apply Layout/EmptyLinesAfterModuleInclusion rule

This rule was added in rubocop 1.79. We were inconsistent about it, so
we're adding it to get more consistency.

spec/components/shared/embedded_video_component_spec.rb

@@ -5,6 +5,7 @@ describe Shared::EmbeddedVideoComponent do
     before do
       dummy_class = Class.new do
         include ActiveModel::Model
+
         attr_accessor :title, :video_url
 
         include Videoable