Fix relative paths for hf spaces

src/pips/gradio_app.py

@@ -32,9 +32,9 @@ except ImportError as exc:  # pragma: no cover - handled at runtime
         "Install it via `pip install gradio`."
     ) from exc
 
-from .core import PIPSSolver
-from .models import AVAILABLE_MODELS, get_model
-from .utils import RawInput
+from pips.core import PIPSSolver
+from pips.models import AVAILABLE_MODELS, get_model
+from pips.utils import RawInput
 
 
 # ---------------------------------------------------------------------------