Add Gnome sort algorithm

[Jccqt]

Summary of Change:

This pull request introduces the Gnome sort, which is a simple comparison-based sorting algorithm. It is simple, but educational.

• I have performed a self-review of my code
• My code follows the style guidelines of this project
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Comments in areas I changed are up to date
• I have added comments to hard-to-understand areas of my code
• I have made corresponding changes to the README.md

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.16%. Comparing base (2ed7a7b) to head (ee71316).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #507   +/-   ##
=======================================
  Coverage   95.16%   95.16%           
=======================================
  Files         267      268    +1     
  Lines       10848    10865   +17     
  Branches     1527     1529    +2     
=======================================
+ Hits        10323    10340   +17     
  Misses        400      400           
  Partials      125      125           

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[siriak]

Looks good, thanks!