Servo firmware almost done

The servo firmware now (with the mainboard) sends validation data back and forth so both the servo and mainboard can verify that the data was sent successfully and can ignore corrupted packets because my wiring can be flaky sometimes

The firmware now sends real data again and is much more robust, with a proper stateful LED that shows useful information, like offline, online and driving motor, homing, error (fast flashing of LED as red), and the error state is also triggered in the case of corrupted packets (I tried it and it works :))

I’m also still printing out the pieces to assemble the arm.

I actually have more hours working on it, I just forgot to log :(((((((