This adds syntax detection for HAML files.
An example would be if using classes provided by [Tailwind CSS][1]
IE:
```html
<div class="flex sm:inline-flex md:block lg:hidden xl:flex ...">
<!-- ... -->
</div>
```
```haml
.flex.sm:inline-flex.md:block.lg:hidden.xl:flex
# ...
```
[1]: https://tailwindcss.com/docs/flexbox-display#responsive
