Missing `href` prop in ClickableTile

The ClickableTile component should define an `href` prop, as it uses it to add a link to the DOM element.

TypeScript warns about it:
```
Type '{ href: string; }' is not assignable to type 'IntrinsicAttributes & { clicked?: boolean; light?: boolean; }'.
  Property 'href' does not exist on type 'IntrinsicAttributes & { clicked?: boolean; light?: boolean; }'. ts(2322)
```