feat: jvp for jacfwd with vectors

[nstarman]

This would speed up and simplify the velocity / acceleration representation transformations.
https://github.com/GalacticDynamics/coordinax/blob/fe0bfbae7c34b0bc71b05d804d00fa472bf4bb98/src/coordinax/_src/vectors/transform/velocities.py