Add view for new tour start page

This will replace the current tour start page

app/main/views/tour.py

@@ -0,0 +1,38 @@
+from flask import abort, render_template
+
+from app import current_service, current_user, url_for
+from app.main import main
+from app.utils import get_template, user_has_permissions
+
+
+@main.route("/services/<uuid:service_id>/tour/<uuid:template_id>")
+@user_has_permissions('send_messages')
+def begin_tour(service_id, template_id):
+    db_template = current_service.get_template(template_id)
+
+    if (db_template['template_type'] != 'sms' or not current_user.mobile_number):
+        abort(404)
+
+    template = get_template(
+        db_template,
+        current_service,
+        show_recipient=True,
+    )
+
+    template.values = {"phone_number": current_user.mobile_number}
+
+    return render_template(
+        'views/templates/start-tour.html',
+        template=template,
+        help='1',
+        continue_link=url_for('.tour_step', service_id=service_id, template_id=template_id, step_index=1)
+    )
+
+
+@main.route(
+    "/services/<uuid:service_id>/tour/<uuid:template_id>/step-<int:step_index>",
+    methods=['GET', 'POST'],
+)
+@user_has_permissions('send_messages', restrict_admin_usage=True)
+def tour_step(service_id, template_id, step_index):
+    pass