fix: use Gitea raw context URL for Stellio (replaces blocked ETSI URL)

contexts/ngsi-ld-core.jsonld

@@ -0,0 +1,40 @@
+{
+  "@context": {
+    "@vocab": "https://uri.etsi.org/ngsi-ld/default-context/",
+    "id": "@id",
+    "type": "@type",
+    "Property": "Property",
+    "Relationship": "Relationship",
+    "GeoProperty": "GeoProperty",
+    "Dataset": "Dataset",
+    "TimeSeries": "TimeSeries",
+    "value": "value",
+    "observedAt": "observedAt",
+    "observationSpace": "observationSpace",
+    "resultTime": "resultTime",
+    "unitCode": "unitCode",
+    "dateIssued": "dateIssued",
+    "dataProvider": "dataProvider",
+    "location": "location",
+    "dateCreated": "dateCreated",
+    "dateModified": "dateModified",
+    "createdAt": "createdAt",
+    "modifiedAt": "modifiedAt",
+    "name": "schema:name",
+    "description": "schema:description",
+    "alternateName": "schema:alternateName",
+    "batteryLevel": "https://smartdatamodels.org/dataModel.Device/batteryLevel",
+    "dateObserved": "https://smartdatamodels.org/dateObserved",
+    "coordinates": "https://purl.org/geojson/vocab#coordinates",
+    "bbox": "https://purl.org/geojson/vocab#bbox",
+    "Sensor": "https://uri.etsi.org/ngsi-ld/default-context/Sensor",
+    "ObservableProperty": "https://uri.etsi.org/ngsi-ld/default-context/ObservableProperty",
+    "Observation": "https://uri.etsi.org/ngsi-ld/default-context/Observation",
+    "FeatureOfInterest": "https://uri.etsi.org/ngsi-ld/default-context/FeatureOfInterest",
+    "Datastream": "https://uri.etsi.org/ngsi-ld/default-context/Datastream",
+    "MultiDatastream": "https://uri.etsi.org/ngsi-ld/default-context/MultiDatastream",
+    "Thing": "https://uri.etsi.org/ngsi-ld/default-context/Thing",
+    "HistoricalLocation": "https://uri.etsi.org/ngsi-ld/default-context/HistoricalLocation",
+    "Location": "https://uri.etsi.org/ngsi-ld/default-context/Location"
+  }
+}