Do syntax highlighting without opening editor

[Zach DeCook]

Is there a method (or neat trick) to create syntax-highlighted-output into 
stdout without opening the editor? (Or perhaps are there other 
syntax-highlighting tools that can use nanorc files as config?)

Something like `nanosyntaxhighlight filename.md`

I'm really fond of my nanorc files, and want an easy-to-use preview tool for a 
more consistent terminal experience.