3. 自动让goimport 和gofmt生效

[guonaihong]

1. 需要在config.lua里面导入go.nvim插件

   
   {
   "ray-x/go.nvim",
   dependencies = { -- optional packages
     "ray-x/guihua.lua",
     "neovim/nvim-lspconfig",
     "nvim-treesitter/nvim-treesitter",
   },
   config = function()
     require("go").setup()
   end,
   event = { "CmdlineEnter" },
   ft = { "go", 'gomod' },
   build = ':lua require("go.install").update_all_sync()' -- if you need to install/update all binaries
   },

在ftplugin里面导入go文件的个性化配置文件
```lua
local format_sync_grp = vim.api.nvim_create_augroup("GoImport", {})
vim.api.nvim_create_autocmd("BufWritePre", {
  pattern = "*.go",
  callback = function()
    require('go.format').goimport()
  end,
  group = format_sync_grp,
})