Add design guidance for components on docs site CMS

[k9dh3zij]

The edited design guidance and PNG images (for those illustrations that we can't use Storybook) can be found here:

https://drive.google.com/drive/folders/1H69uCfgyh80sB7GCDHOkXFiUAYtsnZEG?usp=sharing

This needs to go on our docs site CMS

[github-actions[bot]]

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