Add place=quarter to city subdivisions (#1065)

This adds `place=quarter` which was introduced in 2011 as a subdivision
of villages/towns/cities as a value that sits between `place=suburb` and
`place=neighbourhood`. It has by now been used over 40,000 times and is
rendered in the OSM-Carto.

layers/landuse/landuse.yaml

@@ -38,6 +38,7 @@ layer:
       - theme_park
       - zoo
       - suburb
+      - quarter
       - neighbourhood
       - dam
   datasource: