Don't try to include binary cells in the /rows responses

https://huggingface.co/datasets/frutiemax/themoviedb_posters/discussions/2

> I have some columns that the viewer do not need to load i.e. T5 prompt embeds and VAE features. Currently, the viewer freezes because the dataset is too big to load. Thanks.

https://huggingface.co/datasets/frutiemax/themoviedb_posters/viewer/default/train lags forever to render the following:

We should ignore/hide the binary cells (`bytes (5KB)` for example)

Start at the /rows response handling and trace how binary cells such as `bytes (5KB)` are included. Confirm the response behavior for datasets containing binary columns, then verify that those cells are omitted or hidden and that the dataset viewer no longer freezes while rendering the rows.

Written by the indexing model from the issue text.