Add Support to add images

[DavidLambauer]

The devdocs repo is a collection of markdown files. There is no place to upload images/screenshots or other media. Obviously, it makes sense to add different media files here and there.

We must implement a directory structure for images in the devdocs repo and render them correctly. Please consider potentially resizing the images for mobile views.

[DavidLambauer]

You can add images. Just put them into the media directory 😄. It'd be nice to have a GitHub action that optimizes the images.