[ENH]: Sphinx plot_directive: add an option for embedding pngs as base64 data-urls #21918
Description
Problem
When using the Sphinx plot_directive in a context like IPython + JupyterLab, pointing to image files does not work, as showed in the following screenshot:
Proposed solution
It would be nice to add an option for embedding pngs as base64 data in the resulting HTML.
If you're open to such a feature, I can make a PR myself adding this option.