nvim: Add auto-save plugin

tree/.config/nvim/lua/plugins.lua

@@ -117,4 +117,6 @@ return require('packer').startup(function(use)
     'nvim-lualine/lualine.nvim',
     requires = { 'nvim-tree/nvim-web-devicons', opt = true }
   }
+
+  use "Pocco81/auto-save.nvim"
 end)