PrismJS integration with Uno

[plingampally]

I tried adding PrisimJS (syntax code highlighting) to the Uno theme, however, Prism was not able to parse the suggested way of making a code block, eg.

```language-javascript line-numbers
 var syntax = new AwesomeFeature();
```

Instead, I had to explicitly add the pre and code blocks, eg.

<pre class="line-numbers"><code class="language-javascript">
var syntax = new AwesomeFeature();</code></pre>

I am submitting this here to see if someone has found a cleaner approach to using PrismJS with Uno?