Themes: add charge to bike_parking

assets/layers/bike_parking/bike_parking.json

@@ -692,6 +692,26 @@
         }
       ]
     },
+    {
+      "id": "charge",
+      "condition": "fee=yes",
+      "question": {
+        "en": "How much does it cost to park your bike here?",
+        "nl": "Hoeveel kost het om een fiets te stallen?"
+      },
+      "questionHint": {
+        "en": "This is the amount which is charged for a single bike",
+        "nl": "Dit is de kostprijs voor een enkele fiets"
+      },
+      "render": {
+        "en": "Parking your bike costs {charge}",
+        "nl": "Je fiets hier parkeren kost {charge}"
+      },
+      "freeform": {
+        "key": "charge",
+        "type": "currency"
+      }
+    },
     {
       "builtin": "opening_hours_24_7",
       "override": {