Option to hide script and style tags

[mattjennings]

It'd be useful to have an option to hide script and style tags from the displayed code block.

Ideas:

• meta on code block to hide scripts

  
  ```svelte example hide-scripts
  <script>
  import Button from '$lib/Button'
  </script>

• use the hidden attribute on the tags themselves. i don't think they do anything on script/style? as long as it's safe to repurpose those, that'd be cool.

```svelte example
<script hidden>
   import Button from '$lib/Button'
</script>

<Button class="button" />

<style hidden>
   .button {}
</style>

[mattjennings]

can now be done with hideScript and hideStyle