add nvim config

lua/config/plugins/whichkey.lua

@@ -0,0 +1,13 @@
+return {
+  "folke/which-key.nvim",
+  event = "VeryLazy",
+  init = function()
+    vim.o.timeout = true
+    vim.o.timeoutlen = 300
+  end,
+  opts = {
+    -- your configuration comes here
+    -- or leave it empty to use the default settings
+    -- refer to the configuration section below
+  }
+}