Update generated neovim config

config/neovim/config.lua

@@ -1,3 +1,7 @@
+-- Nixvim's internal module table
+-- Can be used to share code throughout init.lua
+local _M = {}
+
 -- Set up globals {{{
 do
     local nixvim_globals = { mallocalleader = " ", mapleader = " " }