DOC: Add sphinx-togglepromt for python code block examples

[Transurgeon]

Pandas version checks

• I have checked that the issue still exists on the latest versions of the docs on main here

Location of the documentation

Example 1:
https://pandas.pydata.org/docs/dev/reference/api/pandas.DataFrame.groupby.html

Example 2:
https://pandas.pydata.org/docs/dev/reference/api/pandas.crosstab.html#pandas.crosstab

Documentation problem

In the code blocks for the API examples, sometimes there are multiple outputs. This makes it cumbersome to copy the code for rapid conversion to local development.

I was thinking it would be convenient if there was a way to hide the outputs of the code blocks.

Suggested fix for documentation

I did some searching online and found an existing package that does the job.

Repo of toggleprompt

Additionally, we could add a similar javascript file under doc/source/_static that could take care of this issue, instead of downloading an additional package.

Link to implementation of this feature

[mroeschke]

Using sphinx-toggleprompt would be the preferred solution here (we also wanted to incorporate sphinx-copybutton). Pull requests welcome!