Make the project REUSE compliant again

Signed-off-by: Wayne Beaton <[email protected]>

.github/workflows/licensecheck.yml

@@ -1,3 +1,12 @@
+# Copyright (c) 2024 Hannes Wellmann and others.
+#
+# All rights reserved. This program and the accompanying materials
+# are made available under the terms of the Eclipse Public License 2.0
+# which accompanies this distribution, and is available at
+# https://www.eclipse.org/legal/epl-2.0/
+# 
+# SPDX-License-Identifier: EPL-2.0
+
 # This workflow will check for Maven projects if the licenses of all (transitive) dependencies are vetted.
 
 name: License vetting status check