chore: use iwyu on sorting/**.cpp

sorting/wiggle_sort.cpp

@@ -17,12 +17,13 @@
  * arr = [2,8,9,1,7], after wiggle sort arr will become equal to [8,2,9,1,7]
  */
 
-#include <algorithm>
-#include <cassert>
-#include <cstdint>  /// for integral typedefs
-#include <ctime>
-#include <iostream>  /// for io operations
-#include <vector>
+#include <cassert>   // for assert
+#include <cstdint>   // for uint32_t
+#include <ctime>     // for time
+#include <iostream>  // for operator<<, basic_ostream, char_traits, cout, endl
+#include <vector>    // for vector
+#include <cstdlib>   // for rand, srand
+#include <utility>   // for swap
 
 /**
  * @namespace sorting