chore: add cron github action

.github/workflows/cron.yml

@@ -0,0 +1,15 @@
+name: 'Delete old artifacts'
+
+on:
+  schedule:
+    - cron: '0 * * * *' # every hour
+
+jobs:
+  delete-artifacts:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: kolpav/purge-artifacts-action@v1
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          # Keep the last day's worth of builds
+          expire-in: 1day # Setting this to 0 will delete all artifacts