feat: add AriaStatus and AriaAlert to stable entrypoint

[joshblack]

Closes https://github.com/github/primer/issues/6971

Promote AriaStatus and AriaAlert to stable in @primer/react. This stabilizes these components so we should pay attention to the API to see if we need to make any changes 👀

Some things that came to mind include:

• Should delayMs debounce automatically?
• Should we offer support for a static "message" prop so that we don't have to set up the mutation observer for reading the content from the element

Changelog

New

Changed

• Both AriaStatus and AriaAlert are now available directly from @primer/react

Removed

Rollout strategy

• Minor release

[changeset-bot]

🦋 Changeset detected

Latest commit: ec481d0

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]

⚠️ Action required

👋 Hi, this pull request contains changes to the source code that github/github-ui depends on. If you are GitHub staff, test these changes with github/github-ui using the integration workflow. Check the integration testing docs for step-by-step instructions. Or, apply the integration-tests: skipped manually label to skip these checks.

[Copilot]

Pull request overview

This PR promotes the AriaStatus and AriaAlert live-region components from the experimental surface to the stable @primer/react entrypoint, updating Storybook organization and adding docs metadata plus a release changeset.

Changes:

• Re-export AriaStatus/AriaAlert (and their props types) from packages/react/src/index.ts, and update the exports snapshot accordingly.
• Move Storybook titles for both components from Experimental/Components/* to Components/* (including Features).
• Add docs metadata (*.docs.json) for both components and a changeset for a minor release.

Show a summary per file

File	Description
packages/react/src/live-region/AriaStatus.stories.tsx	Moves AriaStatus story into the stable “Components/*” namespace.
packages/react/src/live-region/AriaStatus.features.stories.tsx	Moves AriaStatus feature stories into the stable “Components/*/Features” namespace.
packages/react/src/live-region/AriaStatus.docs.json	Adds docs metadata for AriaStatus under the stable import path.
packages/react/src/live-region/AriaAlert.stories.tsx	Moves AriaAlert story into the stable “Components/*” namespace.
packages/react/src/live-region/AriaAlert.features.stories.tsx	Moves AriaAlert feature stories into the stable “Components/*/Features” namespace.
packages/react/src/live-region/AriaAlert.docs.json	Adds docs metadata for AriaAlert under the stable import path.
packages/react/src/index.ts	Adds stable exports for AriaStatus/AriaAlert and their prop types.
packages/react/src/tests/snapshots/exports.test.ts.snap	Updates export snapshot to include the newly stable exports.
.changeset/grumpy-actors-see.md	Adds a minor-release changeset for the new stable exports.

Review details

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• Files reviewed: 9/9 changed files
• Comments generated: 3
• Review effort level: Lite

[Copilot]

Fixed in ec481d0 — AriaAlertProps<As extends ElementType = 'div'> now matches AriaStatusProps.

[primer]

🤖 Lint issues have been automatically fixed and committed to this PR.