Add boardwalk preset and line styling (close #7518)

css/30_highways.css

@@ -465,6 +465,9 @@ path.line.casing.tag-highway-bridleway {
 path.line.stroke.tag-highway-path {
     stroke: #988;
 }
+path.line.stroke.tag-highway-path.tag-bridge-boardwalk {
+    stroke: #dca;
+}
 
 /* footways */
 .preset-icon .icon.tag-route-foot,

data/presets/presets/highway/path/boardwalk.json

@@ -0,0 +1,25 @@
+{
+    "icon": "temaki-pedestrian",
+    "geometry": [
+        "line"
+    ],
+    "tags": {
+        "highway": "path",
+        "bridge": "boardwalk"
+    },
+    "addTags": {
+        "highway": "path",
+        "bridge": "boardwalk",
+        "surface": "wood"
+    },
+    "reference": {
+        "key": "bridge",
+        "value": "boardwalk"
+    },
+    "terms": [
+        "pier",
+        "plank walkway",
+        "wooden raised foot path"
+    ],
+    "name": "Boardwalk"
+}