updated pretty Display and added BSTRecursiveGenericTest.java

Author: Krishnan M

src/test/java/com/thealgorithms/datastructures/trees/BSTRecursiveGenericTest.java

@@ -1,10 +1,15 @@
 package com.thealgorithms.datastructures.trees;
 
-import static org.junit.jupiter.api.Assertions.*;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
 import java.util.List;
+
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
+import static org.junit.jupiter.api.Assertions.assertFalse;
+
 /**
  * Unit tests for BSTRecursiveGeneric class.
  * Covers insertion, deletion, search, traversal, sorting, and display.