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

sources/logger/IRequestPerformanceLogger.hpp

@@ -0,0 +1,21 @@
+// 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
+
+#pragma once
+
+#include <QString>
+
+namespace QodeAssist {
+
+class IRequestPerformanceLogger
+{
+public:
+    virtual ~IRequestPerformanceLogger() = default;
+
+    virtual void startTimeMeasurement(const QString &requestId) = 0;
+    virtual void endTimeMeasurement(const QString &requestId) = 0;
+    virtual void logPerformance(const QString &requestId, qint64 elapsedMs) = 0;
+};
+
+} // namespace QodeAssist