add descriptions of bicycle parkings (#608)

* add descriptions of bicycle parkings

* tweak capitalization of strings

Co-authored-by: Martin Raifer <martin@raifer.tech>

Author: matkoniecz

data/fields/bicycle_parking.json

@@ -1,5 +1,15 @@
 {
     "key": "bicycle_parking",
     "type": "combo",
-    "label": "Type"
+    "label": "Type",
+    "strings": {
+        "options": {
+            "stands": "Stand (supports bicycle frame)",
+            "wall_loops": "Wheelbender (supports wheel only)",
+            "shed": "Closed Shed",
+            "lockers": "Individual Lockers",
+            "building": "In a Building",
+            "handlebar_holder": "Handlebar Holder"
+        }
+    }
 }