When importing an onnx model, hidet needs to map onnx data types into hidet dtypes. However, in https://github.com/hidet-org/hidet/blob/0cd78c7828232062992d9d5429fd5b0179bf2daa/python/hidet/graph/frontend/onnx/onnx.py#L485 hidet does not have dtype ``double``. I guess it should be ``float64``?