Fix LogView Qt6 compatibility: QStringRef to QStringView migration

- Migrated QStringRef to QStringView in LogViewTetraTelegramsParser
  - Updated tokenize() function signature and implementation
  - Updated bracketCount() helper function
  - Updated validStructTokens() function
  - Updated parseStruct(), parseEnum(), parseConstraint() functions
- Migrated QStringRef to QStringView in LogViewGui.cpp
  - Updated splitRef() to splitView() calls
  - Updated QVector<QStringRef> to QVector<QStringView>
- Migrated QStringRef to QStringView in LogViewXdrParser.cpp
  - Updated midRef() to mid() calls
  - Updated leftRef() to left() calls
- Updated Qt6 include paths: QAbstractTableModel and QModelIndex moved to QtCore

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

qt6-after/qt6-migrated-legatus/TetraIF/LogView/LogViewGui.cpp

@@ -655,7 +655,7 @@ void LogViewGui::updateLogfile()
 
       QString filePath(fileInfo.absolutePath() + QLatin1Char('/'));
       const QString baseName = fileInfo.baseName();
-      const QVector<QStringRef> parts = baseName.splitRef(QLatin1Char('_'));
+      const QVector<QStringView> parts = baseName.splitView(QLatin1Char('_'));
 
       for (int iterator = 0; iterator < parts.size() - 2; ++iterator) 
         filePath += parts.at(iterator).toString() + QLatin1Char('_');
@@ -912,7 +912,7 @@ void LogViewGui::startInjectionThread()
   settings.beginGroup(QLatin1String("LogFiles"));
   QString filePath = settings.value(QLatin1String("Dir")).toString();
   QString exerciseName;
-  QVector<QStringRef> parts = filePath.splitRef(QLatin1Char('/'));
+  QVector<QStringView> parts = filePath.splitView(QLatin1Char('/'));
   if (parts.size() >= 2)
     exerciseName = QLatin1Char('_') + parts.at(parts.size() - 2).toString();