moved backbone models

app.py

@@ -899,9 +899,9 @@ with demo:
 
 
 if USE_HUGGINGFACE_SPACE:
-    from backbone import download_all_models
+    from ncut_pytorch.backbone import download_all_models
     threading.Thread(target=download_all_models).start()
-    from backbone_text import download_all_models
+    from ncut_pytorch.backbone_text import download_all_models
     threading.Thread(target=download_all_models).start()
     
     threading.Thread(target=download_all_datasets).start()