added antiGrief inhabited chunk time calculation

core/src/main/java/eu/mhsl/craftattack/spawn/core/util/NumberUtil.java

@@ -8,4 +8,10 @@ public class NumberUtil {
 
         return out;
     }
+
+    public static <T extends Comparable<T>> T clamp(T value, T min, T max) {
+        if (value.compareTo(min) < 0) return min;
+        if (value.compareTo(max) > 0) return max;
+        return value;
+    }
 }