added todo comments

lua/plugins/todo-comments.lua

@@ -0,0 +1,9 @@
+return {
+  'folke/todo-comments.nvim',
+  dependencies = { 'nvim-lua/plenary.nvim' },
+  opts = {
+    -- your configuration comes here
+    -- or leave it empty to use the default settings
+    -- refer to the configuration section below
+  },
+}