Added implementation for simulated annealing (#1679)

* added hill climbing algorithm

* Shorten long lines, streamline get_neighbors()

* Update hill_climbing.py

* Update and rename optimization/hill_climbing.py to searches/hill_climbing.py

* added hill climbing algorithm

* Shorten long lines, streamline get_neighbors()

* Update hill_climbing.py

* Rebased

* added simulated annealing.py

* added final comments and test

* black formatted

* restricted search domain

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