* added planning data to ReferenceLineInfo now.

virtual objects from different reference lines.

todo: migrate more variable fields from frame to ReferenceLineInfo.

* ReferenceLineInfo will wrap all the data associated with a reference
line.

and decisions

* not all points defined in path_point.proto are path points.
* the points defined in path_point.proto are commonly used in PnC modules

separate data producer and consumer.