fix(cmd): shedule error message instead of showing directly

Author: folke

lua/lazy/core/handler/cmd.lua

@@ -35,7 +35,10 @@ function M:_add(cmd)
 
     local info = vim.api.nvim_get_commands({})[cmd] or vim.api.nvim_buf_get_commands(0, {})[cmd]
     if not info then
-      return Util.error("Command `" .. cmd .. "` not found after loading " .. plugins)
+      vim.schedule(function()
+        Util.error("Command `" .. cmd .. "` not found after loading " .. plugins)
+      end)
+      return
     end
 
     command.nargs = info.nargs