data: showing local symbols

- added local symbols to storage
- added tests for local symbol parsing
- added MessageActivateLocalSymbols to activate local symbols in code view
- TokenLocations now store their LocationType instead of a plain bool "isScope"
- moved LocationType from TokenLocation to separate file, since it is also used in Annotations now.
- added local_symbol in stylesheet to define a style for hovering and activating these elements
- renamed location to token in stylesheet

src/lib/component/controller/UndoRedoController.cpp

@@ -3,6 +3,7 @@
 #include "utility/logging/logging.h"
 #include "utility/messaging/type/MessageActivateTokens.h"
 #include "utility/messaging/type/MessageFlushUpdates.h"
+#include "utility/utility.h"
 
 #include "component/view/UndoRedoView.h"
 #include "data/access/StorageAccess.h"
@@ -52,10 +53,26 @@ void UndoRedoController::handleMessage(MessageActivateFile* message)
 	processCommand(command);
 }
 
+void UndoRedoController::handleMessage(MessageActivateLocalSymbols* message)
+{
+	if (m_lastCommand.message &&
+		m_lastCommand.message->getType() == message->getType() &&
+		utility::isPermutation(
+			message->symbolIds,
+			static_cast<MessageActivateLocalSymbols*>(m_lastCommand.message.get())->symbolIds)
+		)
+	{
+		return;
+	}
+
+	Command command(std::make_shared<MessageActivateLocalSymbols>(*message), 1);
+	processCommand(command);
+}
+
 void UndoRedoController::handleMessage(MessageActivateNodes* message)
 {
-	if (m_lastCommand.message && 
-		m_lastCommand.message->getType() == message->getType() && 
+	if (m_lastCommand.message &&
+		m_lastCommand.message->getType() == message->getType() &&
 		message->nodes.size() &&
 		static_cast<MessageActivateNodes*>(m_lastCommand.message.get())->nodes.size() == message->nodes.size() &&
 		static_cast<MessageActivateNodes*>(m_lastCommand.message.get())->nodes[0].nameHierarchy.getQualifiedNameWithSignature() ==