feat: add housekeeping workflow for container image cleanup

Author: kimdre

.github/workflows/housekeeping.yaml

@@ -11,15 +11,15 @@ jobs:
     runs-on: ubuntu-latest
     permissions:
       packages: write
+    concurrency:
+      group: cleanup-images
     steps:
       - name: Delete untagged images
         uses: dataaxiom/ghcr-cleanup-action@v1
         with:
-          dry-run: true
           keep-n-untagged: 10
       - name: Delete old release candidate images
         uses: dataaxiom/ghcr-cleanup-action@v1
         with:
-          dry-run: true
           delete-tags: '*-rc*'
           keep-n-tagged: 3