Add cache clenup workflow (#35)

* feat: Add cache cleanup workflow

- Close #31

This commit introduces a new workflow to automatically clean up GitHub Actions caches.

The workflow is triggered on pull request closure and can be manually dispatched. It utilizes the `cache-cleanup.yaml` action to remove caches, allowing for efficient cache management.

.github/workflows/cache-cleanup.yaml

@@ -0,0 +1,19 @@
+name: Cache Cleanup
+
+on:
+  pull_request:
+    types: [closed]
+  workflow_dispatch:
+
+jobs:
+  cleanup:
+    name: Cache Cleanup
+    runs-on: ubuntu-latest
+    steps:
+      - name: Cleanup Caches
+        uses: openMF/mifos-mobile-github-actions/.github/workflows/cache-cleanup.yaml@main
+        with:
+          cleanup_pr: ${{ github.event_name == 'pull_request' && github.event.repository.private == true }}
+          cleanup_all: ${{ github.event_name == 'workflow_dispatch' }}
+        secrets:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}