feat: add inorder successor for bst in operations on ds (#1532)

* feat: add inorder successor in bst

* clang-tidy errors fixed, reference docs link added

* updating DIRECTORY.md

* clang-format and clang-tidy fixes for f8658fe

* docs formatting changed, namespace added

* clang-format and clang-tidy fixes for f54f31c

* added bullet points in docs

* Update operations_on_datastructures/inorder_successor_of_bst.cpp

Co-authored-by: David Leal <[email protected]>

* Update operations_on_datastructures/inorder_successor_of_bst.cpp

Co-authored-by: David Leal <[email protected]>

* Update operations_on_datastructures/inorder_successor_of_bst.cpp

Co-authored-by: David Leal <[email protected]>

* Update operations_on_datastructures/inorder_successor_of_bst.cpp

Co-authored-by: David Leal <[email protected]>

* docs improved

* clang-format and clang-tidy fixes for f1b8319

* Update operations_on_datastructures/inorder_successor_of_bst.cpp

Co-authored-by: David Leal <[email protected]>

* clang-format and clang-tidy fixes for 420a4ec

* Apply suggestions from code review

* fix: Apply suggestions from code review

* memory leaks patched

* clang-format and clang-tidy fixes for ac801a1

Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>
Co-authored-by: David Leal <[email protected]>

Author: 3 people

DIRECTORY.md

@@ -220,6 +220,7 @@
   * [Circular Linked List](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/operations_on_datastructures/circular_linked_list.cpp)
   * [Circular Queue Using Array](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/operations_on_datastructures/circular_queue_using_array.cpp)
   * [Get Size Of Linked List](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/operations_on_datastructures/get_size_of_linked_list.cpp)
+  * [Inorder Successor Of Bst](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/operations_on_datastructures/inorder_successor_of_bst.cpp)
   * [Intersection Of 2 Arrays](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/operations_on_datastructures/intersection_of_2_arrays.cpp)
   * [Reverse A Linked List Using Recusion](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/operations_on_datastructures/reverse_a_linked_list_using_recusion.cpp)
   * [Selectionsortlinkedlist](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/operations_on_datastructures/selectionsortlinkedlist.cpp)