How to render emojies in console/script

How to achieve this setup?

The picture below shows an Rstudio setup with graphical rendering of certain letters:

What is this setup? How do I achive this?

As far as I know, all the heavy lifting here is done through this package - GitHub - r-lib/cli: Tools for making beautiful & useful command line interfaces
Here is one example of this in action - tidyverse/attach.R at 6186fbf09bf359110f8800ff989cbbdd40485eb0 · tidyverse/tidyverse · GitHub

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