Placeholder styling

### Description

There is no way to style the placeholder. For example, I need to set the size of the placeholder text to be smaller than the input text.

### Problem Statement

New props for placeholder styling will give the opportunity for deeper customization.

### Proposed Solution or API

``

```
export const theme = extendTheme({
...

components:{
Input:{
defaultProps:{
placeholderStyle:{
fontSize: 'sm',
},
},
},
},
})
```

### Alternatives

_No response_

### Additional Information

_No response_