ui-icon

Hello,

I would like to create/use a shortcode to place folder icons with a title and href ((like google photos/flickr public album)), basically a ui-polaroid with more features.

Shortcode syntax:
```
[ui-icon img="folder.png" href="https://www.getgrav.org" description="gombanap" angle="-3" margin="30px 50px 20px 0" position="left"]
Mushroom day
[/ui-icon]

```

I tried to implement it within this plugin, by:

- adding user\plugins\shortcode-ui\shortcodes\IconShortcode.php
```
shortcode->getHandlers()->add('ui-icon', function(ShortcodeInterface $sc) {

// Add assets
$this->shortcode->addAssets('css', 'plugin://shortcode-ui/css/ui-polaroid.css');

$output = $this->twig->processTemplate('partials/ui-icon.html.twig', [
'shortcode' => $sc,
]);

return $output;
});
}
}
```
- adding user\plugins\shortcode-ui\templates\partials\ui-icon.html.twig

```
{% set gloss = shortcode.getParameter('gloss', true) %}
{% set img = shortcode.getParameter('img', true) %}
{% set fa-icon = shortcode.getParameter('fa-icon', true) %}

{% if gloss is sameas(true) %}

{% endif %}
{% if img is sameas(true) %}

{{ shortcode.getContent()|raw }}
{% else %}
{% if fa-icon is sameas(true) %}

{% endif %}
{% endif %}

{{ shortcode.getContent()|raw }}

The plugin is enabled, a ui-browser shortcode is rendered fine, but my added shortcode is not rendering at all.

Any hints, please?

Thanks!