Add ref:edubase for schools, etc in the UK (#1000)

data/fields/ref/edubase-GB.json

@@ -0,0 +1,16 @@
+{
+    "key": "ref:edubase",
+    "type": "identifier",
+    "label": "Department for Education Reference",
+    "urlFormat": "https://get-information-schools.service.gov.uk/Establishments/Establishment/Details/{value}",
+    "pattern": "^[0-9]{1,}$",
+    "locationSet": {
+        "include": [
+            "gb"
+        ]
+    },
+    "terms": [
+        "Edubase Reference",
+        "DfE URN"
+    ]
+}

data/presets/amenity/college.json

@@ -12,6 +12,7 @@
         "{@templates/internet_access}",
         "{@templates/poi}",
         "denomination",
+        "ref/edubase-GB",
         "religion"
     ],
     "geometry": [

data/presets/amenity/kindergarten.json

@@ -13,6 +13,7 @@
         "capacity",
         "fhrs/id-GB",
         "gnis/feature_id-US",
+        "ref/edubase-GB",
         "internet_access",
         "internet_access/ssid",
         "level",

data/presets/amenity/school.json

@@ -19,6 +19,7 @@
         "fee",
         "fhrs/id-GB",
         "gnis/feature_id-US",
+        "ref/edubase-GB",
         "internet_access",
         "internet_access/ssid",
         "level",