Add preset for natural=arete (#2024)

Resolves #1190

Author: ashree2118

data/presets/natural/arete.json

@@ -0,0 +1,20 @@
+{
+    "icon": "temaki-mountain_range",
+    "geometry": [
+        "line"
+    ],
+    "fields": [
+        "{natural}"
+    ],
+    "moreFields": [
+        "{natural}"
+    ],
+    "tags": {
+        "natural": "arete"
+    },
+    "terms": [
+        "mountains",
+        "ridge"
+    ],
+    "name": "Arête"
+}