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/alster-steamer-st-georg/index.md

@@ -0,0 +1,41 @@
+---
+title: '40C3 Alster Steamer St. Georg'
+date: 2026-10-16T15:49:22+02:00
+summary: |
+    We will discover Hamburg from its most beautiful side - on board of the oldest and only genuine Alster steamer, the “St. Georg” from 1876. The crew, consisting of the captain, the engineer and the conductor, will take us on a trip back in time on the faithfully restored steamship “St. Georg”.
+params:
+  geo:
+    lat: 53.554553
+    lon: 9.991652
+---
+
+We will discover Hamburg from its most beautiful side - on board of the oldest and only genuine Alster steamer, the “St. Georg” from 1876. The crew, consisting of the captain, the engineer and the conductor, will take us on a trip back in time on the faithfully restored steamship “St. Georg”.
+
+## Round trip across the Alster with a view of the night skyline
+
+
+On this exclusive one-hour tour starting at the Jungfernstieg, we will sail from the Inner to the Outer Alster and also take a look at some of the canals and tributaries.
+
+## The Alster Steamer „St. Georg“
+
+Built at Hamburg’s Reiherstieg shipyard in 1876 for the Alster shipping company of H. E. Justus as the “Falke”, the steamer “St. Georg” is today the oldest preserved operational vehicle of Hamburg’s local transport system and also the oldest steamship in Germany.
+
+For 63 years, “St. Georg” was in use as a regular service steamer from Jungfernstieg to Barmbek to Von-Essen-Straße, Mühlenkamp and Winterhuder Fährhaus. In 1911, it was converted into a flush-decker and renamed “Galatea”. In 1919, Hochbahn AG, the transport company of Hamburg, took over the steamer. In 1936, the transport company renamed the steamer “St. Georg”.
+
+After the war, the ship found a new home, via detours, on the Havel and the Wannsee in Berlin - initially as the motor ship “Deutschland” and later under the name of “Planet”.
+
+In 1988, imminent scrapping gave birth to the idea of rescuing the shipwreck and founding the association “Alsterdampfschiffahrt”. The “revival” was achieved at the shipyard in Dresden-Laubegast. There, the steamer was given back its old appearance from the 1930s. In addition, the shipyard gave the steamer a new heart: an old two-cylinder steam engine. Since 1994, the ship has been sailing, alive and kicking, under steam again as “St. Georg” on the Alster.
+
+## Details
+
+* Tours:
+    * Day 1 (27 December) **19:00** {{< calendar date="2026-12-27" time="19:00" duration="150" >}}
+    * Day 2 (28 December) **19:00** {{< calendar date="2026-12-28" time="19:00" duration="150" >}}
+    * Day 3 (29 December) **19:00** {{< calendar date="2026-12-29" time="19:00" duration="150" >}}
+* Duration: 2 hours
+* Language: German
+* Cost: € 11.50
+* Meeting time at Hackertours Desk: **as mentioned above**.
+* Accessibility: The pier and the launch cannot be accessed directly in a wheelchair. Getting on and off the vessel requires navigating steps, and both the vessel and the pier are in constant motion.
+* Location: Jungfernstieg, Anleger 7 (metro and urban railway station “Jungfernstieg”)
+* Organizer: [Verein Alsterdampfschiffahrt e.V.](https://www.alsterdampfer.de/)