Add `%{window-parent-container-orientation}` and `%{workspace-root-container-orientation}` interpolation variables

```
$ aerospace list-windows --focused --format '%{window-parent-container-orientation}'
horizontal
$ aerospace layout vertical
$ aerospace list-windows --focused --format '%{window-parent-container-orientation}'
vertical
```

## Discussions

https://github.com/nikitabobko/AeroSpace/discussions/1739