Peripherals: unified device graph + bindings (Unity Simulation FirmwareEngine)

[Kinin-Code-Offical]

Goal: a shared device graph defines sensors/actuators and how Unity objects bind to simulation I/O and firmware endpoints.

Includes:

• Camera, IMU, GPIO, network, audio/microphone, meters/gauges.
• Input devices mapping into simulated USB/HID/serial paths.

Acceptance:

• Config/spec layer for bindings.
• Device modules can be enabled/disabled with near-zero runtime overhead when unused.

[github-actions]

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