Actually add documentation

Docs/Layers/generic_osm_object.md

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+ generic_osm_object 
+====================
+
+
+
+
+
+
+
+
+## Table of contents
+
+1. [generic_osm_object](#generic_osm_object)
+  - [Basic tags for this layer](#basic-tags-for-this-layer)
+  - [Supported attributes](#supported-attributes)
+    + [all_tags](#all_tags)
+
+
+
+
+
+  - Not rendered on the map by default. If you want to rendering this on the map, override `mapRenderings`
+  - This layer is needed as dependency for layer [grb](#grb)
+
+
+[Go to the source code](../assets/layers/generic_osm_object/generic_osm_object.json)
+
+
+
+ Basic tags for this layer 
+---------------------------
+
+
+
+Elements must have the all of following tags to be shown on this layer:
+
+
+
+  - id~^..*$
+  - 
+  - 
+  - 
+  - type!~^boundary$
+  - 
+  - |<a href='https://wiki.openstreetmap.org/wiki/Key:level' target='_blank'>level</a>=<a href='https://wiki.openstreetmap.org/wiki/Tag:level%3D0' target='_blank'>0</a>
+  - <a href='https://wiki.openstreetmap.org/wiki/Key:layer' target='_blank'>layer</a>=<a href='https://wiki.openstreetmap.org/wiki/Tag:layer%3D0' target='_blank'>0</a>|
+
+
+
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+ Supported attributes 
+----------------------
+
+
+
+
+
+### all_tags 
+
+
+
+_This tagrendering has no question and is thus read-only_
+
+ 
+
+This document is autogenerated from assets/layers/generic_osm_object/generic_osm_object.json