styled-react: Export BaseStyles

[siddharthkp]

• Simple re-export
• Preparation step for styled-react: Add ThemeProvider and BaseStyles #6958 as imports for ThemeProvider, BaseStyles and useTheme need to be moved to @primer/styled-react at the same time to keep them in sync.
• waiting on use-styled-react-import: add theme components eslint-plugin-primer-react#426

Rollout strategy

• Patch release
• Minor release
• Major release; if selected, include a written rollout or migration plan
• None; if selected, include a brief description as to why

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
• (GitHub staff only) Integration tests pass at github/github (Learn more about how to run integration tests)

[changeset-bot]

🦋 Changeset detected

Latest commit: 456860d

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

This PR includes changesets to release 1 package

Name	Type
@primer/styled-react	Patch

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[Copilot]

Pull Request Overview

This PR adds a re-export of the BaseStyles component from @primer/react to the @primer/styled-react package. This is a preparation step to consolidate theme-related exports (ThemeProvider, BaseStyles, and useTheme) in the styled-react package while keeping them synchronized.

• Adds BaseStyles export to the styled-react package index
• Updates the corresponding test snapshot to include the new export

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
packages/styled-react/src/index.tsx	Adds BaseStyles re-export from @primer/react
packages/styled-react/src/tests/snapshots/exports.test.ts.snap	Updates test snapshot to include BaseStyles in the exported list

[primer-integration]

👋 Hi from github/github-ui! Your integration PR is ready: https://github.com/github/github-ui/pull/4116

[primer-integration]

🟢 ci completed with status success.