fixing dap-ui dependencies/timing, added <leader>cdu for dap-ui toggle

lua/config/keymaps.lua

@@ -55,4 +55,7 @@ if status_ok then
   vim.keymap.set("n", "<leader>cdh", function()
     require("dap.ui.widgets").hover()
   end, { desc = "DAP: Hover Variable Value" })
+  vim.keymap.set("n", "<leader>cdu", function()
+    require("dapui").toggle()
+  end, { desc = "Debug: Toggle UI" })
 end