Add Ghcr clean-up workflow

.github/workflows/ghcr-cleanup.yaml

@@ -0,0 +1,44 @@
+name: Delete old ghcr images
+on:
+  schedule:
+    - cron: "15 1 * * *" # every day at 1:15am
+  pull_request:
+    types: [closed]
+  workflow_dispatch:
+
+jobs:
+  ghcr-cleanup:
+    if: ${{ github.event_name == 'schedule' || github.event_name == 'workflow_dispatch' }}
+    name: Delete old vnext images
+    runs-on: ubuntu-latest
+    steps:
+      - name: Delete older than a month vnext images
+        uses: snok/container-retention-policy@v2
+        with:
+          image-names: device/*
+          cut-off: One month ago UTC
+          account-type: org
+          org-name: plgd-dev
+          filter-tags: vnext-*
+          skip-tags: main,latest
+          token: ${{ secrets.GHCR_CLEANUP_PAT }}
+
+      - name: Set up Docker Buildx for delete untagged images action
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to GitHub Container Registry for delete untagged images action
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GHCR_CLEANUP_PAT }}
+
+      - name: Delete untagged images with no dependency
+        uses: Chizkiyahu/delete-untagged-ghcr-action@v3
+        with:
+          repository: ${{ github.repository }}
+          repository_owner: ${{ github.repository_owner }}
+          token: ${{ secrets.GHCR_CLEANUP_PAT }}
+          owner_type: org
+          untagged_only: true
+          except_untagged_multiplatform: true