[Skeleton] Fix array index key anti-pattern

[ravisuhag]

Summary

Skeleton is a custom loading placeholder with shimmer animation. Missing accessibility attributes and reduced-motion support.

Improvements

4. Fix array index key anti-pattern

key={i} used when rendering multiple skeletons via count prop. Could cause issues if count changes dynamically.

Moved to Cross-Cutting Issues

The following items have been moved to cross-cutting issues that address them across all components:

• Replace hardcoded CSS values with design tokens (Replace hardcoded CSS values with design tokens #672)
• Accessibility baseline (Accessibility baseline: aria attributes, roles, and semantic HTML #673)
• Add displayName (Add displayName to components and sub-components #676)
• Animation: prefers-reduced-motion (Add prefers-reduced-motion support for animations #677)

Files

• packages/raystack/raystack/components/skeleton/