refactor(nvim): Move functions to null.util

.config/nvim/lua/null/plug.lua

@@ -1,19 +1,6 @@
--- << Getting lazy.nvim for the first time
-local lazypath = vim.fn.stdpath("data") .. "/lazy/lazy.nvim"
-if not (vim.uv or vim.loop).fs_stat(lazypath) then
-	vim.fn.system({
-		"git",
-		"clone",
-		"--filter=blob:none",
-		"https://github.com/folke/lazy.nvim.git",
-		"--branch=stable", -- latest stable release
-		lazypath,
-	})
-end
-vim.opt.rtp:prepend(lazypath)
--- >>
+local util = require("null.util")
 
-require("lazy").setup({
+util.getch_lazy_nvim().setup({
 	{
   		"stevearc/oil.nvim",
   		opts = {},