A simple skeleton loading component that displays an animated placeholder while content is loading.
## Key Components
- **Skeleton** - Main component that renders a pulsing placeholder div with rounded corners and muted background
## Usage Example
```typescript
import { Skeleton } from './skeleton'
// Basic skeleton
// Multiple skeletons for a card layout
// Custom styling
```
The component accepts all standard HTML div attributes and applies a pulsing animation with a muted background color. The `cn` utility function allows for easy className composition and overrides. Commonly used dimensions and shapes can be applied through the className prop to match the expected content layout.