added the method tryMove and the methods used by it into serverstate

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

@@ -6,7 +6,7 @@
 public class Piece {
     private ShieldState shield;
     private PieceState state;
-    private Color color;
+    private final Color color;
 
     /**
      * This constructor is used to create a new Piece
@@ -73,4 +73,13 @@ public boolean isShielded() {
     public boolean isSuppressed() {
         return shield == ShieldState.SUPPRESSED;
     }
+
+    /**
+     * This method is used to get the color of the piece
+     *
+     * @return the color of the piece
+     */
+    public Color getColor() {
+        return color;
+    }
 }