feat: add MaximumElement implementation with documentation

Author: AbhiramSakha

src/main/java/com/thealgorithms/arrays/MaximumElement.java

@@ -0,0 +1,25 @@
+package com.thealgorithms.arrays;
+
+/**
+ * This class provides a method to find the maximum element in an array.
+ */
+public class MaximumElement {
+
+    /**
+     * Finds the maximum value in the given array.
+     *
+     * @param arr the input array
+     * @return the maximum element in the array
+     */
+    public static int findMax(int[] arr) {
+        int max = Integer.MIN_VALUE;
+
+        for (int num : arr) {
+            if (num > max) {
+                max = num;
+            }
+        }
+
+        return max;
+    }
+}