add outlint plugin

lua/plugins/outline.lua

@@ -0,0 +1,11 @@
+return {
+  'hedyhli/outline.nvim',
+  lazy = true,
+  cmd = { 'Outline', 'OutlineOpen' },
+  keys = { -- Example mapping to toggle outline
+    { '<leader>o', '<cmd>Outline<CR>', desc = 'Toggle outline' },
+  },
+  opts = {
+    -- Your setup opts here
+  },
+}