Refresh: Home - add media component

[stephaniehobson]

Add the media component to the homepage.

The Figma link should take you right there but if not it's under Desktop Prototypes > Homepage V3.

Work with placeholder content for now.
Talk to Tess about hover state.

Note - if you are copying the way the other components are coded, code it in light mode first using the variables prefixed with $m24-color-* and then wrap it in the dark theme.

Example:

<div class="m24-t-dark" id="donate">
  <div class="m24-c-donate">
...
  </div>
</div>

You can look at the donate component on demo4 or main at this commit to see and example.