Stub out the send letters page

app/main/views/send.py

@@ -29,6 +29,13 @@ from app import job_api_client
 from app.utils import validate_recipient, InvalidPhoneError, InvalidEmailError
 
 
+@main.route("/services/<service_id>/send/letters", methods=['GET'])
+def letters_stub(service_id):
+    return render_template(
+        'views/letters.html', service_id=service_id
+    )
+
+
 @main.route("/services/<service_id>/send/<template_type>", methods=['GET'])
 def choose_template(service_id, template_type):
 

app/templates/main_nav.html

@@ -5,6 +5,7 @@
   <ul>
     <li><a href="{{ url_for('.choose_template', service_id=service_id, template_type='sms') }}">Send text messages</a></li>
     <li><a href="{{ url_for('.choose_template', service_id=service_id, template_type='email') }}">Send emails</a></li>
+    <li><a href="{{ url_for('.letters_stub', service_id=service_id) }}">Send letters</a></li>
   </ul>
   <ul>
     <li><a href="{{ url_for('.manage_users', service_id=service_id) }}">Manage team</a></li>

app/templates/views/letters.html

@@ -0,0 +1,17 @@
+{% extends "withnav_template.html" %}
+
+{% block page_title %}
+  Send letters – GOV.UK Notify
+{% endblock %}
+
+{% block maincolumn_content %}
+
+  <h1 class="heading-large">
+    Send letters
+  </h1>
+
+  <p>
+    This page is where you would go to send letters.
+  </p>
+
+{% endblock %}