Editor select

[rmsthebest]

Mostly fixes #42

I will admit I don't know how to configure neovim, but I've added support for the editor I use anyway.
I could have added editors under the optional section but i felt as if having deeper nested selection was a worse experience. Can move it if you want me to

I snuck in space to select as well as that is quite a common key in these terminal interfaces.

[SergioGasquez]

Thanks for the contribution! I think we need to update the target on the helix config file and update the changelog file

[jessebraham]

Thanks for the PR! I had done this locally and forgot to open a PR myself 😅 But this appears to match what I did almost exactly so LGTM!