add item set and menu item set CRUD

spec/views/settings/menu_item_sets/show.html.erb_spec.rb

@@ -0,0 +1,16 @@
+require 'rails_helper'
+
+RSpec.describe "settings/menu_item_sets/show", type: :view do
+  before(:each) do
+    @settings_menu_item_set = assign(:settings_menu_item_set, Settings::MenuItemSet.create!(
+      :item_set_id => nil,
+      :menu_item_id => nil
+    ))
+  end
+
+  it "renders attributes in <p>" do
+    render
+    expect(rendered).to match(//)
+    expect(rendered).to match(//)
+  end
+end