Create word search algorithm (#8906)

* feat(other): Create word_search algorithm

* updating DIRECTORY.md

* doc(word_search): Link to wikipedia article

* Apply suggestions from code review

Co-authored-by: Tianyi Zheng <tianyizheng02@gmail.com>

* Update word_search.py

---------

Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>
Co-authored-by: Tianyi Zheng <tianyizheng02@gmail.com>

Author: 3 people

DIRECTORY.md

@@ -747,6 +747,7 @@
   * [Scoring Algorithm](other/scoring_algorithm.py)
   * [Sdes](other/sdes.py)
   * [Tower Of Hanoi](other/tower_of_hanoi.py)
+  * [Word Search](other/word_search.py)
 
 ## Physics
   * [Altitude Pressure](physics/altitude_pressure.py)