feat: add translation support

src/main/java/eu/midnightdust/yaytris/Tetris.java

@@ -25,6 +25,7 @@ public class Tetris {
             UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
         } catch (Exception | Error e) { System.out.printf("%s: %s\n", "Error setting system look and feel", e); }
         Settings.load();
+        Translation.load(Settings.language.locale);
         HighScores.load();
         timer = new Timer("Tetris falling pieces");
         space = new Space();