Add tmux-like terminal splitting

[matthewp]

Would be great for boo ui to have vertical and horizontal splits. If libghostty includes this part, that would make it even easier and more seamless of a UX, could imagine taking advantage of the user's existing keybindings here maybe?

I'm really bullish on boo as a modern multiplexer, great job on this. One of the annoying things about using tmux, for example, is the additional UI that it adds on top, so I think boo is a good position to not need this, if libghostty provides all of that.

[kylecarbs]

libghostty does not provide this, but it wouldn't be particularly difficult to add.

Could you expand on the desired UX here? I'm not opposed to adding splits, but it would need to be in a simple way.

[matthewp]

Nothing specific really, just that it would be nice if it visually was similar to Ghostty's own split support. But since boo is useable in any terminal emulator that doesn't necessarily made sense. So any design you come up with will work, I'm sure.