Documentation Link

https://matplotlib.org/devdocs/gallery/index.html#examples

Problem

Folks often go to the gallery looking for an overview of plotting methods, which are in the plot types gallery

Suggested improvement

Add a sentence to the top of the example gallery page (which isgalleries/examples/README.txt) pointing to the plot types gallery, something like

For an overview of the plotting methods we provide, see:ref:plot_types

This issue is aimed at getting someone comfortable with our doc build and pr process.