DOC: examples for Styler.pipe

Addresses a recent issue raised in #45686

![Screen Shot 2022-02-08 at 19 18 03](https://user-images.githubusercontent.com/24256554/153050869-5e92947f-b548-43cc-bc4c-f3015c45dc7a.png)
![Screen Shot 2022-02-08 at 19 18 10](https://user-images.githubusercontent.com/24256554/153050880-8ac9bb91-854a-44b7-884b-76357c37c0de.png)


> Some small comments otherwise LGTM.
> 
> Also off topic question, the docstring examples could (in theory) eventually generate different results from the pngs if future changes are made right?

yes they could, not sure how to get around this though given this is a visualisation device that is better shown?  > > Some small comments otherwise LGTM.
> > Also off topic question, the docstring examples could (in theory) eventually generate different results from the pngs if future changes are made right?
> 
> yes they could, not sure how to get around this though given this is a visualisation device that is better shown?

Just curious. Agreed pngs are the better visualization method for these examples.  nice @attack68 

should this close the original issue?