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

[nikitabobko]

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

Discussions

#1739

[KYash03]

#1778