Add SmoothSort (Dijkstra’s adaptive in-place heapsort variant) (#7200)

* feat: implement Smooth Sort algorithm with detailed JavaDoc and test class

* style: format LEONARDO array for improved readability with clang-format

---------

Co-authored-by: Ahmed Allam <60698204+AllamF5J@users.noreply.github.com>

src/test/java/com/thealgorithms/sorts/SmoothSortTest.java

@@ -0,0 +1,8 @@
+package com.thealgorithms.sorts;
+
+public class SmoothSortTest extends SortingAlgorithmTest {
+    @Override
+    SortAlgorithm getSortAlgorithm() {
+        return new SmoothSort();
+    }
+}