Merge pull request 'add brand search' (#2339) from Osmwithspace/MapComplete:layer_scouting_groups into develop

Reviewed-on: MapComplete/MapComplete#2339
Reviewed-by: Pieter Vander Vennet <pietervdvn@posteo.net>

assets/layers/scouting_group/scouting_group.json

@@ -115,7 +115,23 @@
     "mastodon"
   ],
   "filter": [
-    "nsi_brand.brand"
+    "nsi_brand.brand",
+    {
+      "id": "brand_search",
+      "options": [
+        {
+          "osmTags": "brand~i~.*{search}.*",
+          "fields": [
+            {
+              "name": "search"
+            }
+          ],
+          "question": {
+            "en": "Search for brand: {search}"
+          }
+        }
+      ]
+    }
   ],
   "allowMove": true,
   "credits": "Osmwithspace",