Add Whole Tale button for operating on datasets with Jupyter notebooks, Python, R, etc. #208

[pdurbin]

As a follow up to #208 (comment) ...

Whole Tale is a reproducibility platform Dataverse has supported for years thanks to the efforts of @Xarthisius @craig-willis and others.

We've had a Whole Tale button on the demo site for quite a while (lots of screenshots in this issue):

• Add Whole Tale to Dataverse demo site dataverse#6446

We should enable it for Harvard Dataverse too.

Here are a couple videos Craig made in 2020 that show off the integration:

• https://www.youtube.com/watch?v=AoSpQ3A7poY
• https://www.youtube.com/watch?v=oWEcFpEUmrU