update key bindings and display for autocompletion

lua/plugins/autocompletion.lua

@@ -37,8 +37,8 @@ return {
 			completeopt = 'menu,menuone,noinsert',
 		  },
 		  mapping = cmp.mapping.preset.insert {
-			['<C-n>'] = cmp.mapping.select_next_item(),
-			['<C-p>'] = cmp.mapping.select_prev_item(),
+			['<C-j>'] = cmp.mapping.select_next_item(),
+			['<C-k>'] = cmp.mapping.select_prev_item(),
 			['<C-u>'] = cmp.mapping.scroll_docs(-4),
 			['<C-d>'] = cmp.mapping.scroll_docs(4),
 			['<C-Space>'] = cmp.mapping.complete {},
@@ -52,6 +52,9 @@ return {
 			{ name = 'luasnip' },
 			{ name = 'path' },
 		  },
+			experimental = {
+				ghost_text = true,
+			}
 		}
 	end
 }