This is a quick LuaJIT wrapper around the C bindings I wrote exported for https://github.com/dacap/clip

I also started on an implementation using SDL3's clipboard functionality. I didn't know if I should put it in SDL3 or in Image, so it's going here. I would switch fully over except that SDL won't let me use the clipboard until I create a window. Hmm, dangerous sign of bloat, SDL...