40C3: tours, schedule data, tour map and calendar entries

- tour-map shortcode: Leaflet map of the tour locations with routes from the
  Congress, from the map/tours sections of data/schedule/<event>.yaml; Leaflet
  and the OSMIC, Maki and Temaki icon sets vendored; 39C3 uMap data converted.
- calendar shortcode: per tour date, a pill with an .ics download (iCalendar)
  and a Google Calendar link; Font Awesome Free vendored, fa-icon partial.
- README sections for the calendar and tour map shortcodes and the map data.

content/en/40c3/train-museum-lokschuppen-aumuhle/index.md

@@ -0,0 +1,33 @@
+---
+title: '40C3 Train Museum Lokschuppen Aumühle'
+date: 2026-10-16T15:49:22+02:00
+summary: |
+    You enjoyed the light railway at the Camp? You would like to try it out, maybe even drive it yourself?
+
+    You watched the Remote Stellwerk Experience and would like to lay hands on the levers of real signal tours and run virtual trains as a signal master yourself?
+params:
+  geo:
+    lat: 53.530485
+    lon: 10.321248
+---
+
+You enjoyed the light railway at the Camp? You would like to try it out, maybe even drive it yourself?
+
+![The courtyard with field train](lokschuppen_hof.jpeg "© Verein Verkehrsamateure und Museumsbahn e. V.")
+![The signal tower during Remote Stellwerk Experience](lokschuppen_stellwerk.jpeg "© Verein Verkehrsamateure und Museumsbahn e. V.")
+
+You watched the Remote Stellwerk Experience and would like to lay hands on the levers of real signal tours and run virtual trains as a signal master yourself?
+
+At the Train Museum Lokschuppen Aumühle, the Verein Verkehrsamateure und Museumsbahn e. V. has collected and restored trains from 150 years of railroad history, among them multiple generations of Hamburg urban railways. We will use the light railway and take a tour around the grounds of the museum and to its exhibits. Competent volunteer members explain the history of the moving stock, the signal tours and safety equipment, track construction and many other aspects. Where possible, we will show you everything in operation - technology you can touch!
+
+## Details
+
+* Tour: Day 2 (28 December) **11:45** {{< calendar date="2026-12-28" time="11:45" duration="255" >}}
+* Duration: 3 hours
+* Language: German and English
+* Cost: free
+* Meeting time at Hackertours Desk: **as mentioned above**.
+* Accessibility: The tour is accessible with some limitations. The gravel road from the railway station “Aumühle” to the Lokschuppen Aumühle covers a height difference of about 15m (49.21 ft). The ground at the museum is partially very uneven. You cannot reach the inside of the vehicles by elevator; some of the stairways are very steep and have very high steps.
+* Location: Am Mühlenteich, 21521 Aumühle
+* Organizer: [VVM](https://www.vvm-museumsbahn.de)
+* Image Credits: © Verein Verkehrsamateure und Museumsbahn e. V.