### Description
Add a keybinding that toggles centering the terminally horizontally when
it's the only window, while still tiling multiple windows.

This limits the width of long text making it easier to read, and avoids
covering the wallpaper more than necessary.

### Download
- [git branch](https://codeberg.org/guidocella/dwl/src/branch/center-terminal)
- [2024-02-06](https://codeberg.org/dwl/dwl-patches/raw/branch/main/patches/center-terminal/center-terminal.patch)

### Authors
- [Guido Cella](https://codeberg.org/guidocella)
