RTL support for line chart

Is there a way to configure the line chart to commence from the rightmost side of the chart area without the need for scrollController? This would allow the chart to be initially displayed in a right-to-left orientation.

Start by tracing the line chart configuration and the existing scrollController behavior in fl_chart. Determine how the chart currently chooses its initial horizontal position and define what configuration would make it begin on the right without a scrollController; the work is done when RTL-oriented initial display is supported and verified.

Written by the indexing model from the issue text.