Add a custom device command

To create custom Device commands (for example, to support some functionality for a specific HID), create a struct that contains all the data to be sent to the Device, and add a typeStatic property to make that struct implement the IInputDeviceCommandInfo interface. To send data to a HID, this property should return "HIDO".

You can then create an instance of this struct and populate all its fields, then use InputDevice.ExecuteCommand<TCommand> to send it to the Device. The data layout of the struct must match the native representation of the data as the device interprets it.