floating packer window, add diagnostics and buffer close plugins

lua/plugin.lua

@@ -7,7 +7,7 @@ if vim.fn.empty(vim.fn.glob(install_path)) > 0 then
   vim.cmd [[packadd packer.nvim]]
 end
 
-require('packer').startup(function(use)
+require('packer').startup({function(use)
   -- Package manager
   use 'wbthomason/packer.nvim'
 
@@ -25,6 +25,18 @@ require('packer').startup(function(use)
       'folke/neodev.nvim',
     },
   }
+  -- lsp diagnostics
+  use {
+    "folke/trouble.nvim",
+    requires = "nvim-tree/nvim-web-devicons",
+    config = function()
+      require("trouble").setup {
+        -- your configuration comes here
+        -- or leave it empty to use the default settings
+        -- refer to the configuration section below
+      }
+    end
+  }
 
   use { -- Autocompletion
     'hrsh7th/nvim-cmp',
@@ -81,6 +93,9 @@ require('packer').startup(function(use)
   -- bufferline
   use {'akinsho/bufferline.nvim', tag = "v3.*", requires = 'nvim-tree/nvim-web-devicons'}
 
+  -- close buffers
+  use {'ojroques/nvim-bufdel'}
+
   -- toggleterm
   use {"akinsho/toggleterm.nvim", tag = '*', config = function()
     require("toggleterm").setup{
@@ -128,7 +143,12 @@ require('packer').startup(function(use)
   if is_bootstrap then
     require('packer').sync()
   end
-end)
+end,
+config = {
+  display = {
+    open_fn = require('packer.util').float,
+  }
+}})
 
 -- When we are bootstrapping a configuration, it doesn't
 -- make sense to execute the rest of the init.lua.