core/log: add filesystem logger

src/core/filelogger_p.hpp

@@ -0,0 +1,24 @@
+#pragma once
+
+#include <qfile.h>
+#include <qobject.h>
+#include <qtextstream.h>
+#include <qtmetamacros.h>
+
+#include "logging.hpp"
+
+class FileLogger: public QObject {
+	Q_OBJECT;
+
+public:
+	explicit FileLogger() = default;
+
+public slots:
+	void init();
+
+private slots:
+	void onMessage(const LogMessage& msg);
+
+private:
+	QTextStream fileStream;
+};