Add eval.wrap option

[jaspervdj]

This adds a new wrap section to the eval configuration.

By default, the output is wrapped in a code block again with the original syntax highlighting. You can customize this behaviour by setting wrap to:

• code: the default setting.
• raw: no formatting applied.
• rawInline: no formatting applied and no trailing newline.

You can use rawInline to draw graphics. In order to do that, for example, we could configure kitten code snippets to evaluate using Kitty's command icat. This uses the rawInline code setting to ensure that the resulting output is not wrapped in a code block, and the fragment and replace settings immediately replace the snippet:

---
patat:
  eval:
    kitten:
      command: sed 's/^/kitten /' | bash
      replace: true
      fragment: false
      wrap: rawInline
...

See, for example:

```kitten
icat --align left dank-meme.jpg
```