Add new organisation telephone number placeholder page

app/controllers/merge_requests_controller.rb

@@ -8,6 +8,7 @@ class MergeRequestsController < ApplicationController
     confirm_telephone_number
     new_organisation_name
     new_organisation_address
+    new_organisation_telephone_number
     merge_date
   ]
   before_action :authenticate_user!
@@ -17,6 +18,7 @@ class MergeRequestsController < ApplicationController
   def confirm_telephone_number; end
   def new_organisation_name; end
   def new_organisation_address; end
+  def new_organisation_telephone_number; end
   def merge_date; end
 
   def create

app/views/merge_requests/new_organisation_address.html.erb

@@ -23,6 +23,7 @@
         autocomplete: "postal-code",
         width: 10 %>
 
+      <%= f.hidden_field :page, value: "new_organisation_address" %>
       <div class="govuk-button-group">
         <%= f.govuk_submit %>
         <%= govuk_link_to("Skip for now", new_organisation_telephone_number_merge_request_path(@merge_request)) %>

app/views/merge_requests/new_organisation_telephone_number.html.erb

@@ -0,0 +1,5 @@
+<% content_for :before_content do %>
+  <% title = "New organisation telephone number" %>
+  <% content_for :title, title %>
+  <%= govuk_back_link href: new_organisation_address_merge_request_path(@merge_request) %>
+<% end %>