Add a missing "genetic algorithm" folder with a basic algorithm inside (#2179)

* Add a basic genetic algorithm

* Update basic_string.py

* Improve comments and readability

* Add url to wikipedia

* Remove newline

Co-authored-by: Christian Clauss <cclauss@me.com>

* Sort import

Co-authored-by: Christian Clauss <cclauss@me.com>

* Apply suggestions from code review

Co-authored-by: Christian Clauss <cclauss@me.com>

* Improve Comments and readability

* Update basic_string.py

* Improve logic and efficiency

* Add doctest

* Update basic_string.py

* Update basic_string.py

* Update basic_string.py

* Apply suggestions from code review

Co-authored-by: Christian Clauss <cclauss@me.com>

* Update basic_string.py

* Update basic_string.py

* Update basic_string.py

Co-authored-by: Christian Clauss <cclauss@me.com>
Co-authored-by: vinayak <itssvinayak@gmail.com>