Add the ability to customize the preview error

For our implementation we would like to add a support message under the error message (rendered by ``) so that the user has some recourse.

This could be done through a render prop on the `ContentPreview` component, providing the `defaultRender` or `errorCode` as arguments; much like the `renderCustomActionButtons` on `.

**Example:**
```jsx
(
<>
{defaultRender()}

Please contact support at +1 (234) 567-8910

)}
/>
```