Add Greek tranlation and use it

src/main.cpp

@@ -1,10 +1,18 @@
 #include "mainwindow.h"
 
 #include <QApplication>
+#include <QTranslator>
+#include <QLocale>
 
 int main(int argc, char *argv[])
 {
     QApplication a(argc, argv);
+
+    QTranslator translator;
+    if (translator.load(QLocale(), QLatin1String("kdiskinfo"), QLatin1String("_"), QLatin1String(":/translations"))) {
+        a.installTranslator(&translator);
+    }
+
     MainWindow w;
     w.setWindowIcon(QIcon(":/icons/icon.svg"));
     w.show();