VerticalLine label text wording couldn't rotate

Hello, I am using the fl_chart plugin. extraLineData is used when drawing line graphs. Found that text cannot be rotated according to the angle.

I looked at the source of the plugin and found that the drawVerticalLines method can be modified as follows:

Then we can get the following effect：

Could you please add a field to set the rotation Angle of the text? Thanks very much.

Start by locating the extraLineData implementation and its drawVerticalLines method in the fl_chart source. Trace how VerticalLine labels are painted, then add a configurable text rotation angle and verify that labels render at the requested angle, including the existing default behavior.

Written by the indexing model from the issue text.