refactor esch_lu

doc/source/esch_lu.md

@@ -0,0 +1,36 @@
+# Esch sur Alzette
+
+Support for the Esch sur Alzette communal website in Luxembourg.
+
+## Configuration via configuration.yaml
+
+```yaml
+waste_collection_schedule:
+  sources:
+    - name: esch_lu
+      args:
+        zone: A
+```
+
+### Configuration Variables
+
+There is currently only one conficuration variable, which is *zone*, which accepts only two chars - A or B.
+
+**zone**
+*(char) (required)*
+
+This variable indicates collection zone. The city is divided by two zones with different collection schedule.
+One can identify their zone prior to configuring here:
+<https://administration.esch.lu/dechets/>
+
+## Sensor setup
+
+There are following types of garbage parsed:
+
+- Poubelle ménage
+- Papier
+- Organique
+- Verre
+- Valorlux
+- Déchets toxiques
+- Container ménage