vim: re-arrange lsp, add polyglot

files/nvim/.config/nvim/lua/mappings.lua

@@ -98,7 +98,7 @@ require('Comment').setup({
 local cmp = require 'cmp'
 cmp.setup({
   mapping = {
-    ["<C-n>"] = cmp.mapping.select_prev_item(),
+    ["<C-p>"] = cmp.mapping.select_prev_item(),
     ["<C-n>"] = cmp.mapping.select_next_item(),
     ["<Tab>"] = cmp.mapping.confirm({
       behavior = cmp.ConfirmBehavior.Insert,