[license] client/simple: SPDX-License-Identifier: AGPL-3.0-or-later

SPDX short-form identifiers to communicate license information in a simple,
efficient, portable and machine-readable manner [1]

[1] https://spdx.dev/learn/handling-license-info/

client/simple/src/js/pkg/ol.ts

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
 import { Feature, Map as OlMap, View } from "ol";
 import { createEmpty } from "ol/extent";
 import { GeoJSON } from "ol/format";