I’ve made an application launcher for myself that uses fzf to pick the application. Currently, it launches in an Alacritty window with a special config - it’s a small rectangle that has the fzf dialog, you pick the application and it goes away. That’s all the interaction needed. If I wanted to try to make this “GUI” more generic, what would I use?
I don’t think ST works on Wayland except through the ordinary Wayland X11 server they have to suppor legacy software. You might want to ask the Suckless people what their opinion is of Wayland and whether they will support it in the future.
Or you can use any other terminal emulator that does support Wayland, I only recommend ST because it is the simplest one and is specifically designed to be easy to hack.