Add support for Ocean Controls KTA-223

[adamj537]

Add SDK support for the KTA-223. The KTA-223 has eight relay outputs, three analog inputs, and 4 digital inputs, as well as a small 5V power supply, so it can control LEDs, control power to a device, and measure voltages. It can also be programmed using the Arduino IDE and controlled remotely via serial port or RS-485. It can also be daisy-chained via RS-485.

Additional context
This is necessary as part of a larger effort to use the Test Suite to control bed-of-nails functional tests in a factory.