refactor: Restructure project into sources/tests layout and dissolve PluginLLMCore

sources/logger/RequestPerformanceLogger.hpp

@@ -0,0 +1,26 @@
+// Copyright (C) 2025 Povilas Kanapickas <povilas@radix.lt>
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Additional attribution terms under GPLv3 §7(b) apply — see LICENSE
+
+#include "IRequestPerformanceLogger.hpp"
+#include <QDateTime>
+#include <QMap>
+
+namespace QodeAssist {
+
+class RequestPerformanceLogger : public IRequestPerformanceLogger
+{
+public:
+    RequestPerformanceLogger() = default;
+    ~RequestPerformanceLogger() override = default;
+
+    void startTimeMeasurement(const QString &requestId) override;
+    void endTimeMeasurement(const QString &requestId) override;
+    void logPerformance(const QString &requestId, qint64 elapsedMs) override;
+    void logPerformance(const QString &requestId, const QString &operation, qint64 elapsedMs);
+
+private:
+    QMap<QString, qint64> m_requestStartTimes;
+};
+
+} // namespace QodeAssist