Brand template repo

Demo ⁠ I’ve been meaning to make my own theme/branding to use across my various pkgdown sites, and ever since learning about _brand.yml ⁠ I have wanted to use that as the core. A brand file declares styling that gets picked up nicely across most of the Posit ecosystem, to varying degrees ⁠ . I tried writing this up myself in Spring but got busy and frustrated very quickly. I got access to Claude…