More intuitive window dragging - swap or join

[a-grmbl]

First of all, thanks for the amazing application!

It might be cool to have window dragging behave similarly to Yabai:

• when you drag into window center, it swaps windows
• when you drag to side of the window (like 25% of width/height) it joins new window as horizontal/vertical tile
• also Yabai gives you a visual cue, outline covering full or half of the target window

Cheers!