Option to snap window to fill remaining space

[elliotzero]

First, thank you so much for this elegant little app. It's made my experience coming over from Windows so much smoother.

I'd love to see a feature that's in both Windows and now Mac OS Sequoia where windows can snap to fill the remaining space on the desktop when another window is resized. Mac OS calls this "tiling."

Example:

1. Drag or hotkey-move a window to the left side of the desktop.
2. Drag the window border to a different width.
3. Drag or hotkey-move a second window to the right side of the desktop, and that second window fills the remaining space left by the first window.

Currently you can do this natively by first dragging a window to the screen edge or dragging while holding Option, but not via hotkeys alone (that I'm aware of). On Windows, default behavior enables snap-filling via hotkey.

[MrKai77]

Moved to: #774