add a keybindings help plugin.

lua/plugins/help.lua

@@ -0,0 +1,20 @@
+-- Some help functions
+--
+return {
+  "folke/which-key.nvim",
+  event = "VeryLazy",
+  opts = {
+    -- your configuration comes here
+    -- or leave it empty to use the default settings
+    -- refer to the configuration section below
+  },
+  keys = {
+    {
+      "<leader>?",
+      function()
+        require("which-key").show({ global = false })
+      end,
+      desc = "Buffer Local Keymaps (which-key)",
+    },
+  },
+}