chore: expand support for custom trees

[francinelucca]

Relates to https://github.com/github/primer/issues/6456

Making ActionList compatible with tree-like structures and also exporting useRovingTabIndex for custom usages. Made some modifications to the hook but they're all opt-in so treeview functionality should not be affected.

Changelog

New

• Expanded the list of selectable roles and list role types in ActionList/Item.tsx to include treeitem and tree, improving accessibility and compatibility with tree-like structures.
• Enhanced the useRovingTabIndex hook in TreeView to support additional options such as preventScroll, and dependencies, allowing for more customizable and robust keyboard navigation.
• Exported the useRovingTabIndex hook from the package's main entry point, making it available for external use.
• Added ActionListContainerContext to the exports and as a static property on the ActionList component, making it easier for consumers to access the context for advanced use cases.
• Added tests and stories for the new functionalities

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-ui (Learn more about how to run integration tests)

[changeset-bot]

🦋 Changeset detected

Latest commit: 3efc334

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.

To publish a canary release for integration testing, apply the Canary Release label to this PR.

[primer-integration]

👋 Hi from github/github-ui! Your integration PR is ready: https://github.com/github/github-ui/pull/20336

[primer-integration]

Integration test results from github/github-ui:

  CI Passed
  VRT Passed
  Projects Passed

All checks passed!