Move legacy primer/primitives into Primer React

[langermank]

Part of https://github.com/github/primer/issues/2054

As we gear up for Primitives v8 (next major) I'm looking for ways we can stopgap the breaking change to provide more time for Primer libraries to upgrade. This PR copies the dist that Primer React depends on directly into Primer React which allows us to remove it from Primitives. The only thing truly referenced from Primitives are colors, while most other values were hand written in the theme file.

Goals:

• Don't break anything
• No major refactor, just a stopgap

Changelog

New

• Adds the colors dist from primer/primitives and removes dependency

Changed

• Moved typography into the theme file directly and removed the unused stuff
• Converted to es modules

Rollout strategy

• Patch release
• Minor release
• Major release; if selected, include a written rollout or migration plan

Testing & Reviewing

Merge checklist

• Added/updated tests
• Added/updated documentation
• Added/updated previews (Storybook)
• Changes are SSR compatible
• Tested in Chrome
• Tested in Firefox
• Tested in Safari
• Tested in Edge

Take a look at the What we look for in reviews section of the contributing guidelines for more information on how we review PRs.

[changeset-bot]

🦋 Changeset detected

Latest commit: 3d43bf4

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@primer/react	Minor

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[github-actions]

size-limit report 📦

Path	Size
dist/browser.esm.js	104.47 KB (-0.48% 🔽)
dist/browser.umd.js	105.08 KB (-0.43% 🔽)

[joshblack]

Could these files be .ts with the variable set as const? This could mean that the files are checked with TypeScript and we don't have to check-in the generated definition files.

[langermank]

Totally! Thanks, will make that change 😄

[langermank]

@joshblack took a stab at converting it all to JS, can you give it a look? I don't totally know what I'm doing.

[joshblack]

Seems great! I think we just need to debug the integration PR failing and should be good to try out in our next release 👀