feat: possibility to set initial acceleration

We have to enable the case where we wanna directly start a TPM with a Speed and acceleration. Thats why the defaultController / KeepVelocity unit is not allowed to directly override the acceleration value in time stamp 0. Its fine for timestamp 1 but for a imediate Handover we need to be able to handover a more detailed "initial" state.

In general has the standard the design flaw that we are not able to initialize all of the Car attributes (acceleration, OrientationAcceleration..)