Added TowerOfHanoi Algorithm in Backtracking

[Saloni-2005]

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Describe your change:

• [x] Add an algorithm TowerOfHanoi in Backtracking
• [ ] Fix a bug or typo in an existing algorithm?
• [ ] Documentation change?

Checklist:

• [x] I have read CONTRIBUTING.md.
• [x] This pull request is all my own work -- I have not plagiarized.
• [x] I know that pull requests will not be merged if they fail the automated tests.
• [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms.
• [x] All new JavaScript files are placed inside an existing directory.
• [x] All filenames should use the UpperCamelCase (PascalCase) style. There should be no spaces in filenames. Example:UserProfile.js is allowed but userprofile.js,Userprofile.js,user-Profile.js,userProfile.js are not
• [x] All new algorithms have a URL in their comments that points to Wikipedia or another similar explanation.
• [ ] If this pull request resolves one or more open issues then the commit message contains Fixes: #{$ISSUE_NO}.

@raklaptudirm , Kindly review this pr. Thankyou!

[codecov-commenter]

Codecov Report

:x: Patch coverage is 0% with 27 lines in your changes missing coverage. Please review. :white_check_mark: Project coverage is 85.80%. Comparing base (08d8c6b) to head (146b760).

Files with missing lines	Patch %	Lines
Backtracking/TowerOfHanoi.js	0.00%	27 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1834      +/-   ##
==========================================
- Coverage   85.91%   85.80%   -0.12%     
==========================================
  Files         379      380       +1     
  Lines       19778    19805      +27     
  Branches     3015     3016       +1     
==========================================
  Hits        16993    16993              
- Misses       2785     2812      +27     

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