feature_request(themes): more themes for code blocks support

[Kristinita]

1. Summary

It would be nice, if Wildfire will support more themes for highlighted code in comments, than dark and light.

2. Argumentation

Site design compatibility.

3. Examples of expected behavior

Color schemes in my site:

• Paraiso-light:

• Fruity:

I can't use these themes in Wildfire Markdown GFM code blocks:

Thanks.