Component: Add skeleton screen loader for cards, text blocks, and avatars

[Nareshkumawat-star]

Feature Request

Skeleton loaders are a standard modern UX pattern for indicating content is loading. EaseMotion CSS has no skeleton loader component.

Proposed Component

• Classes: .ease-skeleton, .ease-skeleton--text, .ease-skeleton--card, .ease-skeleton--avatar
• Shimmer effect using a background linear-gradient that slides left-to-right
• CSS variables: --ease-skeleton-base, --ease-skeleton-shine, --ease-skeleton-duration
• Dark mode compatible out of the box
• No JavaScript required

Files to Create

submissions/examples/ease-skeleton/style.css
submissions/examples/ease-skeleton/demo.html
submissions/examples/ease-skeleton/README.md

[github-actions]

Hey @Nareshkumawat-star! 👋

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