chore: add GitHub Actions workflow for cache cleanup

- Introduced a new workflow to automate the cleanup of GitHub Actions caches on a weekly schedule and via manual trigger.
- Implemented steps to fetch and delete cache keys using the GitHub CLI, ensuring efficient cache management.
- Configured permissions to allow the workflow to write actions, enhancing the overall maintenance of the repository.

These changes improve the management of cached data, helping to optimize workflow performance and resource usage.

.github/workflows/cleanup-caches.yml

@@ -0,0 +1,35 @@
+name: Cleanup Caches
+
+on:
+  workflow_dispatch:  # Manual trigger
+  schedule:
+    - cron: '0 0 * * 0'  # Run weekly at midnight on Sunday
+
+jobs:
+  cleanup:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Cleanup
+        run: |
+          gh extension install actions/gh-actions-cache
+          
+          REPO=${{ github.repository }}
+          BRANCH=${{ github.ref }}
+          
+          echo "Fetching list of cache keys..."
+          cacheKeys=$(gh actions-cache list -R $REPO -B $BRANCH | cut -f 1)
+          
+          ## Setting this to not fail the workflow while deleting cache keys
+          set +e
+          
+          echo "Deleting caches..."
+          for cacheKey in $cacheKeys
+          do
+              gh actions-cache delete $cacheKey -R $REPO -B $BRANCH --confirm
+          done
+          echo "Done"
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+permissions:
+  actions: write