Oddbean new post about login | logout https://github.com/neoclide/coc.nvim this is the one you need to drop into config .. I use vim-plug so not sure about lazyvim config but should work out in similar way ... The link you shared is the market place built on Coc .. It is a good idea but I have no use of it :-)
Once you have the plugin installed .. :PlugInstall in my case with vim-plug - then you can install other coc-extensions .. for example :cocInstall coc-ltex for language tools .. there are tons of them which you can see at the market place ..