creates a docs-only <ColorComponent> to allow display of separate colors

[mdole]

Discussed with @owendodd and Design would like to have the option to not display every color in Palette in the same section, instead picking out a color or group of colors to display.

This is due to a change in the way we're dealing with colors - in Notion, you can see Primary, Secondary, and Deprecated colors, and these lists will likely grow and change over time.

The docs update in this PR allows greater flexibility by creating a mini-component that takes a color (e.g. black100) and outputting a color bar, hex code, and title in the same manner as the old Colors page.

After this is merged, @owendodd can create <ColorComponents /> using the docs admin to match our current colors.

Two things that could be improved about this implementation:

1. hexes are not automatically generated and have to be input separately from the color code. I feel like this could be fixed, but not sure how.
2. This will have to be manually updated every time we change or add to our colors. Would be great to figure out a way to automate that process.

Old page, which always displayed every color:

New page, which allows display of select colors:

[artsyit]

Deploy preview for artsy-palette ready!

Built with commit 0820aa2

https://deploy-preview-377--artsy-palette.netlify.com

[mdole]

ok, updated! I'm a little unclear on how the GlobalStyles bit works/how to test it - I couldn't figure out where we're currently using those. If I guessed right on those, I think this should be good to go @zephraph if you want to give it a quick look

[zephraph]

I think this is good for a first pass. We can always follow up with how we can improve the pattern going forward.

Great work @mdole and thanks @damassi and @owendodd for the valuable input 🙏

[artsyit]

🚀 PR was released in v4.9.1 🚀

[mdole]

Thanks @zephraph - it does look like the MDX portion is bugged, and I'm not sure how to fix this. @ds300 or @damassi would one of you have a few minutes to pair on this today?