Improve error message in lv-config file (#922)

init.lua

@@ -1,8 +1,9 @@
 require "default-config"
 require "keymappings"
-local status_ok, _ = pcall(vim.cmd, "luafile " .. CONFIG_PATH .. "/lv-config.lua")
+local status_ok, error = pcall(vim.cmd, "luafile " .. CONFIG_PATH .. "/lv-config.lua")
 if not status_ok then
   print "something is wrong with your lv-config"
+  print(error)
 end
 require "plugins"
 vim.g.colors_name = O.colorscheme -- Colorscheme must get called after plugins are loaded or it will break new installs.