[docs] Improvements
Based on @mishig25's [feedback](https://huggingface.slack.com/archives/C0311GZ7R6K/p1684484245379859), this adds:
- a response to the code snippets in the Quickstart
- an end-to-end example of using `/parquet` to get a dataset, analyze it, and plot the results
- button to open in a Colab notebook to run examples right away
[docs] Improvements: Based on @mishig25's [feedback](https://huggingface.slack.com/archives/C0311GZ7R6K/p1684484245379859), this adds:
- a response to the code snippets in the Quickstart
- an end-to-end example of using `/parquet` to get a dataset, analyze it, and plot the results
- button to open in a Colab notebook to run examples right away