Example Neovim and Helix configs for beginners

[anton-trunov]

It would be nice to have simple but full config files for Neovim and Helix, so that beginners could simply download those and start immediately hack on their Tact projects.

What do you think @novusnota?

I guess this could be extended to Vim and Emacs as well.

Or we could even extend it to a repo that explains how to set up development environments using various editors/IDEs together with a Node.js package manager and Blueprint/Sandbox. I think this could be supported by a bounty.