refactor: use vim.ui.input for y/n selections

also add clear_prompt again.
fixes #1441

lua/nvim-tree/actions/node/open-file.lua

@@ -112,9 +112,7 @@ local function pick_window()
   end
   local _, resp = pcall(get_user_input_char)
   resp = (resp or ""):upper()
-  if vim.opt.cmdheight._value ~= 0 then
-    vim.api.nvim_command "normal! :"
-  end
+  utils.clear_prompt()
 
   -- Restore window options
   for _, id in ipairs(selectable) do