Split-Screen (Splitter) Support

Bobcat 0.9.4 introduces powerful split-screen support while staying true to its stacked-display philosophy. With this release, you can now view **up to two terminals at once** using a flexible splitter interface, while still managing your terminal stack just as before.
 
-   Split orientation can be toggled **on the fly**: horizontal (top/bottom) or vertical (side-by-side).
    
-   You can **swap** the two panes or **any open terminal with any splitter pane** at any time.