Add configuration file

src/services/configmanager.h

@@ -0,0 +1,29 @@
+#ifndef CONFIGMANAGER_H
+#define CONFIGMANAGER_H
+
+#define FILENAME "config.json"
+
+#include <QJsonDocument>
+#include <QJsonObject>
+#include <QStandardPaths>
+#include <QString>
+#include <QDir>
+
+#include "../models/appconfiguration.h"
+
+class ConfigManager
+{
+private:
+    QString getSaveFilePath();
+    void load();
+    AppConfiguration *cfg;
+
+public:
+    ConfigManager();
+    ~ConfigManager();
+
+    AppConfiguration *getConfiguration();
+    void writeToDisk();
+};
+
+#endif // CONFIGMANAGER_H