Any interest in sxhkd-like syntax for multiple similar bindings?

On linux I use `sxhkd`, where you can write keybinds like this:

```
# focus the node in the given direction
super + {h,j,k,l}
bspc node -f {west,south,north,east}
```

Multiple `{}` groups are supported too, as long as the keybind and the command have the same number of groups.

In skhd of course the binding would be 8 lines long:

```
cmd + h
chunkc tiling::window -f west
cmd + j
chunkc tiling::window -f south
# same with k and l
```

I don't know if you're interested in functionality like this? (or if you don't care much about writing it, but would be fine with a PR?)

The issue names no files or tests. Start by locating skhd's binding syntax and expansion entry points, then compare them with the sxhkd examples; done would mean defining and implementing grouped bindings with matching keybind and command groups, including the equivalent directional mappings.

Written by the indexing model from the issue text.