Typos in readme

[qkzk]

Hello Chris,

Sorry I'm not going to create a PR since I know you're still working on it.

There's a few typos in the readme :

...

From crates.io:

cargo install colorgen-nvim

(instead of colorscheme-nvim)

...

The format is foreground background style special

The - is used to skip a particular section and replace it with NONE

[qkzk]

Since I'm talking about the readme, I think it would be nice to add a way to test the colorscheme without having to create a repo and having to get it with Packer or another plugin manager.

[ChristianChiarulli]

Thanks, testing it should be as easy as dropping the finished product in your lua/ directory