feat: add an unpatch() function

lua/dressing/init.lua

@@ -6,13 +6,25 @@ M.setup = function(opts)
   config.update(opts)
 end
 
+local original_input
+local original_select
+
 M.patch = function()
   -- For Neovim before 0.6
   if not vim.ui then
     vim.ui = {}
   end
+  if not original_input then
+    original_input = vim.ui.input
+    original_select = vim.ui.select
+  end
   vim.ui.input = require("dressing.input")
   vim.ui.select = require("dressing.select")
 end
 
+M.unpatch = function()
+  vim.ui.input = original_input
+  vim.ui.select = original_select
+end
+
 return M