Some design updates

Hey all - just FYI I updated some of the logo elements and added a new repository here:

I also opened a PR to remove logo elements from the governance repo. Hope that’s OK!

For this site, there is now a “wide” rectangular logo, and the traditional logo is a “square” one that shows up when you scroll down the site. I couldn’t find SVG files for those logos, so I had to eyeball the creation of a new one, let me know if I missed something.