Add dummy sync_hf_space.yaml for testing

.github/workflows/sync_hf_space.yaml

@@ -0,0 +1,15 @@
+name: Sync to Hugging Face Space
+
+on:
+  push:
+    branches: [main]
+
+  workflow_dispatch:
+
+jobs:
+  sync-space:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0