Add minimal NixOS example

[Lord-Valen]

I stripped down devos for a slimmer, simpler, template. All the features devos implements can still be implemented and users can learn how it's done by comparing the two. It might be worth making a minimal darwin template to mirror this one.

Resolves: #498 Resolves: #500

[Lord-Valen]

error: [json.exception.parse_error.101] parse error at line 154, column 1: syntax error while parsing object key - invalid literal; last read: '"nixlib"<U+000A>        ],<U+000A><'; expected string literal

Now that's a curious one, I've been seeing this on my own system in various places recently. I wonder what causes it?