add examples for ICS

remove them from ICS test-cases and ICS docu

doc/ics/luebeck_de.md

@@ -0,0 +1,23 @@
+# Lübeck Entsorgungsbetriebe
+
+Lübeck Entsorgungsbetriebe is supported by the generic [ICS](/doc/source/ics.md) source. For all available configuration options, please refer to the source description.
+
+
+## How to get the configuration arguments
+
+- Goto <https://insert-it.de/BMSAbfallkalenderLuebeck> and select your location.  
+- Right-click on `iCalendar` and copy link address.
+- Replace the `url` in the example configuration with this link.
+- Replace the year in the url with `{%Y}`.
+
+## Examples
+
+### Dampfpfeife 2
+
+```yaml
+waste_collection_schedule:
+  sources:
+    - name: ics
+      args:
+        url: https://insert-it.de/BMSAbfallkalenderLuebeck/Main/Calender?bmsLocationId=127863&year={%Y}
+```