Access Brand Guidelines

### Describe your goals

I was addressing an intercomm request about people wanting to know how to properly refer to us and went to give them instructions to the brand guide page. [https://hcb.hackclub.com/branding](https://hcb.hackclub.com/branding)

### Describe the bug

There is no navigation way to get to the branding guide, you have to google it. It's a real page, but not connected to any of our navigation menus. https://hcb.hackclub.com/branding

Start at https://hcb.hackclub.com/branding and inspect the site's existing navigation menus and the route that serves the page. Add a discoverable navigation link to the branding guide, then verify that the link works from the relevant menu or menus.

Written by the indexing model from the issue text.