Starts to establish the means by which I'll implement ADB devices.

Machines/Apple/ADB/ReactiveDevice.cpp

@@ -0,0 +1,21 @@
+//
+//  ReactiveDevice.cpp
+//  Clock Signal
+//
+//  Created by Thomas Harte on 12/02/2021.
+//  Copyright © 2021 Thomas Harte. All rights reserved.
+//
+
+#include "ReactiveDevice.hpp"
+
+using namespace Apple::ADB;
+
+ReactiveDevice::ReactiveDevice(Apple::ADB::Bus &bus) : device_id_(bus.add_device(this)) {}
+
+void ReactiveDevice::post_response(const std::vector<uint8_t> &&response) {
+	response_ = std::move(response);
+}
+
+void ReactiveDevice::advance_state(double microseconds) {
+	(void)microseconds;
+}