rename two_factor to two_factor_sms

it's a bit confusing now that there are three endpoints. the other two
are already renamed two_factor_email and two_factor_webauthn

app/templates/views/two-factor-sms.html

@@ -0,0 +1,31 @@
+{% extends "withoutnav_template.html" %}
+{% from "components/page-footer.html" import page_footer %}
+{% from "components/form.html" import form_wrapper %}
+
+{% block per_page_title %}
+  Text verification
+{% endblock %}
+
+{% block maincolumn_content %}
+
+<div class="govuk-grid-row">
+  <div class="govuk-grid-column-two-thirds">
+    <h1 class="heading-large">Check your phone</h1>
+
+    <p class="govuk-body">We’ve sent you a text message with a security code.</p>
+
+    {% call form_wrapper(class="extra-tracking") %}
+      {{ form.sms_code(param_extensions={
+          "classes": "govuk-input govuk-input--width-5",
+          "attributes": {"data-module": "autofocus"}
+      }) }}
+      {{ page_footer(
+        "Continue",
+        secondary_link=url_for('main.check_and_resend_text_code', next=redirect_url),
+        secondary_link_text='Not received a text message?'
+      ) }}
+    {% endcall %}
+  </div>
+</div>
+
+{% endblock %}