Add morris traversal algorithm

[PARTH-TUSSLE]

Added an algorithm - Morris Traversal Algorithm - #1806

• I have read CONTRIBUTING.md.
• This pull request is all my own work -- I have not plagiarized.
• I know that pull requests will not be merged if they fail the automated tests.
• This PR only adds one algorithm file.
• All new JavaScript files are placed inside an existing directory.
• The filnename uses the UpperCamelCase (PascalCase) . With no spaces in filenames.
• The new algorithms have a URL in their comments that points to Wikipedia or another similar explanation.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.99%. Comparing base (08d8c6b) to head (646cb97).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1810      +/-   ##
==========================================
+ Coverage   85.91%   85.99%   +0.07%     
==========================================
  Files         379      380       +1     
  Lines       19778    19888     +110     
  Branches     3015     3026      +11     
==========================================
+ Hits        16993    17103     +110     
  Misses       2785     2785              

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[PARTH-TUSSLE]

@appgurueu and @raklaptudirm kindly review my PR

• I have kept all the contributing guidelines in mind while contributing
• All the checks and tests have been passed successfully