Is your feature request related to a problem? Please describe.
Currently, Sankey charts area always justified with the leaf nodes showing at the right of the chart. It would be nice to have to option to have the leaf nodes left aligned, so that they show at the same depth of other nodes with the same logical depth.

Describe the solution you'd like
Add an option to left align Sankey nodes.

Describe alternatives you've considered
N/A

Additional context
See d3 sankey node alignment property: https://github.com/d3/d3-sankey?tab=readme-ov-file#alignments