Add documentation on themes, move some themes around

Docs/Themes/shops.md

@@ -0,0 +1,42 @@
+
+
+ Open Shop Map ( shops) 
+------------------------
+
+
+
+On this map, one can mark basic information about shops, add opening hours and phone numbers
+
+This theme contains the following layers:
+
+
+
+  - [shops](../Layers/shops.md)
+  - [pharmacy](../Layers/pharmacy.md)
+  - [gps_location](../Layers/gps_location.md)
+  - [gps_location_history](../Layers/gps_location_history.md)
+  - [home_location](../Layers/home_location.md)
+  - [gps_track](../Layers/gps_track.md)
+  - [note_import_shops](../Layers/note_import_shops.md)
+  - [note_import_pharmacy](../Layers/note_import_pharmacy.md)
+
+
+Available languages:
+
+
+
+  - en
+  - fr
+  - ja
+  - zh_Hant
+  - ru
+  - de
+  - it
+  - nb_NO
+  - hu
+  - nl
+  - ca
+  - da
+ 
+
+This document is autogenerated from [assets/themes/shops/shops.json](https://github.com/pietervdvn/MapComplete/blob/develop/assets/themes/shops/shops.json)