Adding sica lu (#2520)

* Added SICA waste calendar

* Raise error on invalid JSON

---------

Co-authored-by: Serge Wagener <serge@wagener.family>

doc/source/sica_lu.md

@@ -0,0 +1,44 @@
+# SICA
+
+Support for municipalities being part of "**S**yndicat **I**ntercommunal pour l'hygiène publique du canton de **CA**pellen"
+
+## Configuration via configuration.yaml
+
+```yaml
+waste_collection_schedule:
+  sources:
+    - name: sica_lu
+      args:
+        municipality: Steinfort
+```
+
+### Configuration Variables
+
+The only configuration needed is the name of the municipality or town.
+
+**municipality**
+*(string) (required)*
+
+Valid values is one of the following:
+
+- Bertrange
+- Capellen
+- Garnich
+- Holzem
+- Kehlen
+- Koerich
+- Kopstal
+- Mamer
+- Septfontaines
+- Steinfort
+
+## Included collection types
+
+- Clothing and Shoes
+- Glass
+- Organic waste
+- Paper - Cartons
+- Residual waste
+- Scrap and electrical appliances
+- Trees, shrubs and hedges
+- Valorlux packaging