Replaced targetProgramCounterUpdated signal with new ReadProgramCounter Insight worker task.

Also some other bits of tidying

src/Insight/InsightWorker/Tasks/ReadProgramCounter.hpp

@@ -0,0 +1,20 @@
+#pragma once
+
+#include "InsightWorkerTask.hpp"
+
+namespace Bloom
+{
+    class ReadProgramCounter: public InsightWorkerTask
+    {
+        Q_OBJECT
+
+    public:
+        ReadProgramCounter() = default;
+
+    signals:
+        void programCounterRead(std::uint32_t programCounter);
+
+    protected:
+        void run(TargetController::TargetControllerConsole& targetControllerConsole) override;
+    };
+}