Add Diving Platform preset (#637)

data/presets/man_made/tower/diving.json

@@ -0,0 +1,23 @@
+{
+    "icon": "temaki-diving",
+    "geometry": [
+        "point",
+        "area"
+    ],
+    "fields": [
+        "{man_made/tower}",
+        "tower/platforms"
+    ],
+    "tags": {
+        "man_made": "tower",
+        "tower:type": "diving"
+    },
+    "reference": {
+        "key": "tower:type",
+        "value": "diving"
+    },
+    "terms": [
+        "diving tower"
+    ],
+    "name": "Diving Platform"
+}