feat: Adds markdown view for hugo rendering

pretix_congressschedule/urls.py

@@ -1,5 +1,5 @@
 from django.urls import path
-from .api import CongressScheduleView
+from .api import CongressScheduleView, HackertoursMarkdownView
 
 urlpatterns = [
     path(
@@ -7,4 +7,9 @@ urlpatterns = [
         CongressScheduleView.as_view(),
         name='schedule-xml',
     ),
+    path(
+        'api/v1/event/<str:organizer>/<str:event>/schedule.md',
+        HackertoursMarkdownView.as_view(),
+        name='schedule-md',
+    ),
 ]