Document typographic and visual styles in a general guide

[deweydell]

Description

We want to create a general overview of some styles used on the site so we can be consistent and developers have something to reference if they need to work on a new design.

Why this is valuable:

Since we don't always have designs for every new feature, it would be helpful to have a guide for developers to reference when they are putting together a new visual feature.

Acceptance Criteria

• Add STYLE_GUIDE.md to the /docs directory
• Style guide contains overview of branding guide including colors & fonts
• Style guide includes examples of titles, headers, backgrounds used on the site

Resources

[deweydell]

I kind of feel now that this should be integrated into our storybook docs via #13 . Why have multiple sources of information?