Lots of tidying

- Removed generic `avr8` target
- Simplified AVR8 target construction
- Introduced register descriptor IDs
- Simplified GDB register mappings
- Simplified target interface contract
- Other bits of tidying

src/Insight/Insight.hpp

@@ -79,19 +79,18 @@ namespace Bloom
         InsightProjectSettings& insightProjectSettings;
 
         EventListener& eventListener;
+        Services::TargetControllerService targetControllerService = Services::TargetControllerService();
 
         QApplication application;
 
         std::map<decltype(InsightWorker::id), std::pair<InsightWorker*, QThread*>> insightWorkersById;
-
         InsightWindow* mainWindow = new InsightWindow(
             this->environmentConfig,
             this->insightConfig,
-            this->insightProjectSettings
+            this->insightProjectSettings,
+            this->targetControllerService.getTargetDescriptor()
         );
 
-        Services::TargetControllerService targetControllerService = Services::TargetControllerService();
-
         Targets::TargetState lastTargetState = Targets::TargetState::UNKNOWN;
         bool targetStepping = false;
         QTimer* targetResumeTimer = nullptr;