Add more plugins mainly from LazyVim

lua/custom/plugins/dashboard.lua

@@ -0,0 +1,10 @@
+-- https://github.com/nvimdev/dashboard-nvim
+return {
+  'nvimdev/dashboard-nvim',
+  dependencies = { { 'nvim-tree/nvim-web-devicons' } },
+  event = 'VimEnter',
+  opts = {},
+  config = function(_, opts)
+    require('dashboard').setup(opts)
+  end,
+}