docs(ActionRow): document role=toolbar and aria-label for button group usage

Without guidance, consumers using ActionRow to group interactive controls
have no nudge to add ARIA grouping semantics. The added JSDoc shows the
recommended pattern (role="toolbar" + aria-label) and notes that both
are already accepted via HTMLAttributes — no new props needed.

Addresses WCAG 4.1.2 Name, Role, Value and 1.3.1 Info and Relationships.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: Edward Zarecor

src/ActionRow/index.tsx

@@ -1,6 +1,23 @@
 import React from 'react';
 import classNames from 'classnames';
 
+/**
+ * Layout utility that arranges action controls in a horizontal row or vertical stack.
+ *
+ * When ActionRow groups interactive controls (buttons, links), add `role="toolbar"`
+ * and `aria-label` so assistive technology users can identify the group and
+ * distinguish multiple ActionRows on the same page:
+ *
+ * ```jsx
+ * <ActionRow role="toolbar" aria-label="Form actions">
+ *   <Button variant="tertiary">Cancel</Button>
+ *   <Button variant="primary">Submit</Button>
+ * </ActionRow>
+ * ```
+ *
+ * Both props are accepted via the standard HTML attributes spread; no extra
+ * prop definitions are required.
+ */
 interface ActionRowProps extends React.HTMLAttributes<HTMLElement> {
   /** Specifies the base element */
   as?: React.ElementType;