Don't allow previously hidden items to be checkable; add ActionMenu js API

[camertron]

What are you trying to accomplish?

This PR does three things for the ActionMenu component:

1. Fixes the issue described in https://github.com/github/primer/issues/2873
2. Adds a JavaScript API to ActionMenu to make it easier to hide, disable, and check items.
3. Fires a custom event called itemActivated whenever an item is activated by the mouse or keyboard.

Integration

No changes necessary in production.

List the issues that this change affects.

Fixes https://github.com/github/primer/issues/2873

Risk Assessment

• Low risk the change is small, highly observable, and easily rolled back.
• Medium risk changes that are isolated, reduced in scope or could impact few users. The change will not impact library availability.
• High risk changes are those that could impact customers and SLOs, low or no test coverage, low observability, or slow to rollback.

Accessibility

• No new axe scan violation - This change does not introduce any new axe scan violations.

Merge checklist

• Added/updated tests
• Added/updated documentation
• Added/updated previews (Lookbook)
• Tested in Chrome
• Tested in Firefox
• Tested in Safari
• Tested in Edge

[changeset-bot]

🦋 Changeset detected

Latest commit: 47d0690

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

This PR includes changesets to release 1 package

Name	Type
@primer/view-components	Minor

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