I recommend installing Obtainium. In Obtainium, click Add App and then paste the Codeberg URL for Infinity for Lemmy: https://codeberg.org/Bazsalanszky/Infinity-For-Lemmy
Obtainium will take care of installing and updating from various code repositories whether they’re hosted on GitHub or Codeberg or some other place.
The kitty terminal graphics protocol is implemented by kitty, WezTerm, Konsole, and others I believe.