fix(cmp): use better cmp.confirm

lua/lazyvim/util/cmp.lua

@@ -36,4 +36,25 @@ function M.add_missing_snippet_docs(window)
   end
 end
 
+-- This is a better implementation of `cmp.confirm`:
+--  * check if the completion menu is visible without waiting for running sources
+--  * create an undo point before confirming
+-- This function is both faster and more reliable.
+---@param opts? {select: boolean, behavior: cmp.ConfirmBehavior}
+function M.confirm(opts)
+  local cmp = require("cmp")
+  opts = vim.tbl_extend("force", {
+    select = true,
+    behavior = cmp.ConfirmBehavior.Insert,
+  }, opts or {})
+  return function(fallback)
+    if cmp.core.view:visible() or vim.fn.pumvisible() == 1 then
+      LazyVim.create_undo()
+      if cmp.confirm(opts) then
+        return
+      end
+    end
+    return fallback()
+  end
+end
 return M