add dashboard plugin

lua/custom/plugins/dashboard.lua

@@ -0,0 +1,19 @@
+return {
+  {
+    'nvimdev/dashboard-nvim',
+    event = 'VimEnter',
+    config = function()
+      require('dashboard').setup {
+        theme = 'hyper',
+        config = {
+          week_header = { enable = true },
+          footer = {},
+          shortcut = {
+            { desc = '󰊳 Update Lazy', group = '@property', action = 'Lazy update', key = 'u' },
+          },
+        },
+      }
+    end,
+    dependencies = { { 'nvim-tree/nvim-web-devicons' } },
+  },
+}