fix: Clear FPGA Cart X/Y/Theta accumulators in clearEncoders

[h-brenne]

What?

Clear FPGA Cart X/Y/Theta accumulators in addition to raw Encoder 1 and 2 counters in clearEncoders.

Why?

This is the behavior I would expect when using the Cart accumulators, allowing reset to zero before collecting a path. Could consider separating into clearEncoders and a clearCartAccumulators depending on the intended use cases.

[SONOBOTICS-paddy]

This command doesn't actually clear any accumulators:

self.clearCounterEnable([0, 0, 0, 0, 0, 0, 0, 0])
self.clearCounterEnable([0, 0, 0, 0, 1, 1, 1, 0])

Only the first bit completes the general encoder and accumulator reset, so if it is 0 it resets whereas it being 1 initialises it again. The other bits aren't considered and therefore, using this command effectively has no further impact on the accumulators.