feat: publish REUSE workflow template

workflow-templates/reuse.properties.json

@@ -0,0 +1,5 @@
+{
+  "name": "REUSE compliance check",
+  "description": "Check SPDX headers and licensing metadata for REUSE compliance.",
+  "iconName": "octicon verified"
+}

workflow-templates/reuse.yml

@@ -0,0 +1,28 @@
+# This workflow is maintained by LibreCodeCoop/github-workflows and published
+# through the LibreCodeCoop organization workflow catalog.
+#
+# https://github.com/LibreCodeCoop/github-workflows
+# https://docs.github.com/en/actions/learn-github-actions/sharing-workflows-with-your-organization
+
+# SPDX-FileCopyrightText: 2022 Free Software Foundation Europe e.V. <https://fsfe.org>
+#
+# SPDX-License-Identifier: CC0-1.0
+
+name: REUSE Compliance Check
+
+on: [pull_request]
+
+permissions:
+  contents: read
+
+jobs:
+  reuse-compliance-check:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          persist-credentials: false
+
+      - name: REUSE Compliance Check
+        uses: fsfe/reuse-action@676e2d560c9a403aa252096d99fcab3e1132b0f5 # v6.0.0