Config Tweaks for Nushell

Here’s a tmux binding to readily launch a nu session, while leaving $SHELL alone.

bind C new-window -- nu

And nvim-nu.nvim for Nushell support in Neovim through Treesitter.

use {
  "LhKipp/nvim-nu",
  run = ":TSInstall nu",
  config = function()
    require("nu").setup{}
  end
}