Add reuse workflow (#342)

Author: afritzler

.github/workflows/reuse.yml

@@ -0,0 +1,11 @@
+name: REUSE Compliance Check
+
+on: pull_request
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: REUSE Compliance Check
+        uses: fsfe/reuse-action@v2