Lazily show contributors of file as authors

It would be nice to show the authors as a component or as as docs.json setting

- We have control over the mdx
```jsx
// shown after page load
```
or
- Perhaps the better approach but less flexible
```json
{
...
"enable_authors": true
...
}
```

- or why not both

Example:


Implementation example can be found here:

https://www.tronic247.com/how-to-show-github-contributors-of-a-file/