Split hailhydrant into layers

langs/layers/zh_Hant.json

@@ -448,6 +448,9 @@
             "render": "單車停車場"
         }
     },
+    "extinguisher": {
+        "description": "顯示消防栓的地圖圖層。"
+    },
     "ghost_bike": {
         "name": "幽靈單車",
         "presets": {
@@ -458,5 +461,9 @@
         "title": {
             "render": "幽靈單車"
         }
+    },
+    "hydrant": {
+        "description": "顯示消防栓的地圖圖層。",
+        "name": "消防栓地圖"
     }
 }