feat: added integer conversion to StoneType enum

src/main/java/uulm/teamname/marvelous/gamelibrary/entities/StoneType.java

@@ -1,11 +1,36 @@
 package uulm.teamname.marvelous.gamelibrary.entities;
 
+import java.util.HashMap;
+import java.util.Map;
+
 /** Specifies the type of an {@link InfinityStone}. */
 public enum StoneType {
-    SpaceStone,
-    MindStone,
-    RealityStone,
-    PowerStone,
-    TimeStone,
-    SoulStone
+    SpaceStone(0),
+    MindStone(1),
+    RealityStone(2),
+    PowerStone(3),
+    TimeStone(4),
+    SoulStone(5);
+
+    private final int id;
+    private final static HashMap<Integer, StoneType> map;
+
+    private StoneType(int id) {
+        this.id = id;
+    }
+
+    static {
+        map = new HashMap<>();
+        for (StoneType stoneType : StoneType.values()) {
+            map.put(stoneType.id, stoneType);
+        }
+    }
+
+    public static StoneType valueOf (int stoneType) {
+        return map.get(stoneType);
+    }
+
+    public int getID() {
+        return id;
+    }
 }