A simple checkbox input.

*Uncontrolled (interactive) checkbox*
```js
<div>
  <Checkbox description="Foo" />
  <Checkbox description="Bar" />
</div>
```

*Disabled empty checkbox*
```js
<Checkbox disabled description="Baz" />
```

*Disabled checked checkbox*
```js
<Checkbox disabled checked description="Bop" />
```

*Small checkbox (used for tables)*
```js
<Checkbox.Small />
```
