Matplotlib theme explorer

[holtzy]

Add a section in the matplotlib page. Add 26 buttons for the 26 matplotlib prebuilt themes. Clicking on a button should show the theme result in a plot below.
Note that post #199-matplotlib-style-sheets is dedicated to matplotlib themes

[holtzy]

DO IT

[JosephBARBIERDARNAL]

https://www.matplotlib-journey.com/bonus/building-theme