RC/RF link simulation: inter-process radio bus + receiver mapping

[Kinin-Code-Offical]

Goal: External programs can act like an RC transmitter; RobotWin receives channels via a 'radio bus' with realistic latency/jitter.

Scope:

• Define a simple IPC transport (UDP or shared memory ring buffer) for RC channels.
• Map channels to a simulated receiver feeding either MCU pins/UART or RPi input device.

Acceptance:

• Can run a separate desktop app to transmit channels; RobotWin consumes them.