added a method for getting a piece through a uuid

Projekte/mdga/model/src/main/java/pp/mdga/game/Game.java

@@ -144,6 +144,22 @@ public Piece getPieceThroughIdentifier(String identifier){
         return board.getPlayerData().get(Color.valueOf(parts[0])).getPieces()[Integer.parseInt(parts[1])];
     }
 
+    /**
+     * This method will be used to return a piece based on the UUID.
+     *
+     * @return the piece specified by the UUID
+     */
+    public Piece getPieceThroughUUID(UUID pieceId){
+        for (var playerData : board.getPlayerData().values()) {
+            for (var piece : playerData.getPieces()) {
+                if (piece.getUuid().equals(pieceId)) {
+                    return piece;
+                }
+            }
+        }
+        return null;
+    }
+
     /**
      * This method notifies the observers.
      */