Attempt a shortcode for the schedule overview

data/schedule/38c3.yaml

@@ -0,0 +1,41 @@
+# Tour schedule for 38C3, rendered by the schedule shortcode.
+# tour: slug of the tour page in this section; lang: de, en or deen.
+days:
+  - day: 1
+    date: "2024-12-27"
+    tours:
+      - { time: "12:15", tour: curious-community-lab }
+      - { time: "13:00", tour: ndr }
+      - { time: "14:30", tour: xfel }
+      - { time: "15:00", tour: desy }
+      - { time: "15:30", tour: ndr }
+      - { time: "15:45", tour: lounge }
+      - { time: "16:00", tour: gaengeviertel }
+      - { time: "17:15", tour: alter-elbtunnel, lang: de }
+      - { time: "18:15", tour: miwula }
+      - { time: "19:30", tour: alsterdampfer }
+  - day: 2
+    date: "2024-12-28"
+    tours:
+      - { time: "10:30", tour: flora }
+      - { time: "10:45", tour: chaostrawler }
+      - { time: "12:00", tour: eisenbahnmuseum }
+      - { time: "12:30", tour: flora }
+      - { time: "13:30", tour: alternative-harbor-cruise }
+      - { time: "14:15", tour: alter-elbtunnel, lang: en }
+      - { time: "16:00", tour: gaengeviertel }
+      - { time: "17:15", tour: tour-der-giganten }
+      - { time: "18:00", tour: alter-elbtunnel, lang: de }
+      - { time: "18:15", tour: miwula }
+  - day: 3
+    date: "2024-12-29"
+    tours:
+      - { time: "11:15", tour: chaostrawler }
+      - { time: "13:30", tour: alternative-harbor-cruise }
+      - { time: "13:45", tour: electrum }
+      - { time: "14:00", tour: energiebunker }
+      - { time: "14:45", tour: electrum }
+      - { time: "15:00", tour: energiebunker }
+      - { time: "16:00", tour: gaengeviertel }
+      - { time: "17:15", tour: alter-elbtunnel, lang: de }
+      - { time: "18:15", tour: miwula }