Developer plugin to echo template names/filepaths [closed]

I am looking for a WordPress plugin that prints file template names, maybe with a designating border. Magento has “template hints”, as you can see in this screenshot:

If there is not such a plugin and someone would like to develop it with me, let’s do that, too!

I use a plugin called Query Monitor, that does a whole bunch of stuff, including showing the page’s template. It’s in the WordPress Repo.