feat(snacks): use snacks.dashboard as the default dashboard. moved dashboard-nvim to extras (#4832)

## Description

<!-- Describe the big picture of your changes to communicate to the
maintainers
  why we should accept this pull request. -->

Snacks has a new dashboard plugin that will be LazyVim's default.

Check the docs at
https://github.com/folke/snacks.nvim/blob/main/docs/dashboard.md

## Related Issue(s)

<!--
  If this PR fixes any issues, please link to the issue here.
  - Fixes #<issue_number>
-->

## Screenshots

<!-- Add screenshots of the changes if applicable. -->

## Checklist

- [x] I've read the
[CONTRIBUTING](https://github.com/LazyVim/LazyVim/blob/main/CONTRIBUTING.md)
guidelines.

lua/lazyvim/plugins/extras/ui/alpha.lua

@@ -1,7 +1,6 @@
 return {
 
-  { "nvimdev/dashboard-nvim", enabled = false },
-  { "echasnovski/mini.starter", enabled = false },
+  { "folke/snacks.nvim", opts = { dashboard = { enabled = false } } },
   -- Dashboard. This runs when neovim starts, and is what displays
   -- the "LAZYVIM" banner.
   {

lua/lazyvim/plugins/extras/ui/dashboard-nvim.lua

@@ -0,0 +1,68 @@
+return {
+  { "folke/snacks.nvim", opts = { dashboard = { enabled = false } } },
+  {
+    "nvimdev/dashboard-nvim",
+    lazy = false, -- As https://github.com/nvimdev/dashboard-nvim/pull/450, dashboard-nvim shouldn't be lazy-loaded to properly handle stdin.
+    opts = function()
+      local logo = [[
+           ██╗      █████╗ ███████╗██╗   ██╗██╗   ██╗██╗███╗   ███╗          Z
+           ██║     ██╔══██╗╚══███╔╝╚██╗ ██╔╝██║   ██║██║████╗ ████║      Z    
+           ██║     ███████║  ███╔╝  ╚████╔╝ ██║   ██║██║██╔████╔██║   z       
+           ██║     ██╔══██║ ███╔╝    ╚██╔╝  ╚██╗ ██╔╝██║██║╚██╔╝██║ z         
+           ███████╗██║  ██║███████╗   ██║    ╚████╔╝ ██║██║ ╚═╝ ██║           
+           ╚══════╝╚═╝  ╚═╝╚══════╝   ╚═╝     ╚═══╝  ╚═╝╚═╝     ╚═╝           
+      ]]
+
+      logo = string.rep("\n", 8) .. logo .. "\n\n"
+
+      local opts = {
+        theme = "doom",
+        hide = {
+          -- this is taken care of by lualine
+          -- enabling this messes up the actual laststatus setting after loading a file
+          statusline = false,
+        },
+        config = {
+          header = vim.split(logo, "\n"),
+          -- stylua: ignore
+          center = {
+            { action = 'lua LazyVim.pick()()',                           desc = " Find File",       icon = " ", key = "f" },
+            { action = "ene | startinsert",                              desc = " New File",        icon = " ", key = "n" },
+            { action = 'lua LazyVim.pick("oldfiles")()',                 desc = " Recent Files",    icon = " ", key = "r" },
+            { action = 'lua LazyVim.pick("live_grep")()',                desc = " Find Text",       icon = " ", key = "g" },
+            { action = 'lua LazyVim.pick.config_files()()',              desc = " Config",          icon = " ", key = "c" },
+            { action = 'lua require("persistence").load()',              desc = " Restore Session", icon = " ", key = "s" },
+            { action = "LazyExtras",                                     desc = " Lazy Extras",     icon = " ", key = "x" },
+            { action = "Lazy",                                           desc = " Lazy",            icon = "󰒲 ", key = "l" },
+            { action = function() vim.api.nvim_input("<cmd>qa<cr>") end, desc = " Quit",            icon = " ", key = "q" },
+          },
+          footer = function()
+            local stats = require("lazy").stats()
+            local ms = (math.floor(stats.startuptime * 100 + 0.5) / 100)
+            return { "⚡ Neovim loaded " .. stats.loaded .. "/" .. stats.count .. " plugins in " .. ms .. "ms" }
+          end,
+        },
+      }
+
+      for _, button in ipairs(opts.config.center) do
+        button.desc = button.desc .. string.rep(" ", 43 - #button.desc)
+        button.key_format = "  %s"
+      end
+
+      -- open dashboard after closing lazy
+      if vim.o.filetype == "lazy" then
+        vim.api.nvim_create_autocmd("WinClosed", {
+          pattern = tostring(vim.api.nvim_get_current_win()),
+          once = true,
+          callback = function()
+            vim.schedule(function()
+              vim.api.nvim_exec_autocmds("UIEnter", { group = "dashboard" })
+            end)
+          end,
+        })
+      end
+
+      return opts
+    end,
+  },
+}

lua/lazyvim/plugins/extras/ui/mini-starter.lua

@@ -1,8 +1,7 @@
 -- start screen
 return {
   -- disable alpha
-  { "goolord/alpha-nvim", enabled = false },
-  { "nvimdev/dashboard-nvim", enabled = false },
+  { "folke/snacks.nvim", opts = { dashboard = { enabled = false } } },
 
   -- enable mini.starter
   {