nvim/plug/coc: disable loading when NodeJS is missing

Rather than just disabling configuration, we instead simply disable the
entire plugin before it loads.

nvim/lua/psoxizsh/plugins/config/coc.lua

@@ -2,8 +2,6 @@ return function()
   local fn, o, g = vim.fn, vim.opt, vim.g
   local vimp, au = require 'vimp', require 'psoxizsh.autocmd'
 
-  if fn.executable('node') == 0 then return end
-
   local t = function(s)
     return vim.api.nvim_replace_termcodes(s, true, true, true)
   end

nvim/lua/psoxizsh/plugins/plug.lua

@@ -79,6 +79,7 @@ local plugins = {
 
   -- IDE stuff + language highlighting
   { 'neoclide/coc.nvim',
+      disable = vim.fn.executable('node') ~= 1,
       branch = 'release',
       after = 'vimp',
       config = require 'psoxizsh.plugins.config.coc'