add leveling feature

src/main/java/cc/fascinated/bat/common/MathUtils.java

@@ -48,4 +48,15 @@ public final class MathUtils {
     public static double lerp(double a, double b, double t) {
         return a + t * (b - a);
     }
+
+    /**
+     * Generates a random number between a minimum and maximum.
+     *
+     * @param min The minimum value.
+     * @param max The maximum value.
+     * @return The random value.
+     */
+    public static double random(double min, double max) {
+        return Math.random() * (max - min) + min;
+    }
 }