add result.nu module

[ExpandingMan]

This is a module for storing and accessing previously output results.

The way it works is pretty simple: it uses the display_output hook to append results to an environment variable. The subtlety that tripped me up is that one must be very careful to preserve the metadata of ls output to preserve the ls colors in the display output. The only reliable way to do this is to store metadata separately, as most operations will not preserve it.

I wasn't sure whether this would be better off in modules or hooks, but it's structured as a module and provides the commands result, result ls and result select for accessing the results, so I figured it was better off in modules.

[fdncred]

We're trying to move all these to a folder of their own with their own readme.md. it just makes it easier to consume. Can you make those changes please?

[ExpandingMan]

Ok done. I've also gotten rid of the reference I had made to my personal color scheme.

[fdncred]

Thanks