Added program to check Lucky number

[TaranjeetSinghKalsi]

Added program to check if a given number is a Lucky number or not using recursive and iterative approaches with testcases

• [x] I have read CONTRIBUTING.md.
• [x] This pull request is all my own work -- I have not plagiarized it.
• [x] All filenames are in PascalCase.
• [x] All functions and variable names follow Java naming conventions.
• [x] All new algorithms have a URL in their comments that points to Wikipedia or other similar explanations.
• [x] All new code is formatted with clang-format -i --style=file path/to/your/file.java

[codecov-commenter]

Codecov Report

:white_check_mark: All modified and coverable lines are covered by tests. :white_check_mark: Project coverage is 78.29%. Comparing base (a4cf6e3) to head (9f070b3). :warning: Report is 1 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #6962      +/-   ##
============================================
+ Coverage     78.26%   78.29%   +0.02%     
- Complexity     6567     6575       +8     
============================================
  Files           743      744       +1     
  Lines         21886    21907      +21     
  Branches       4284     4287       +3     
============================================
+ Hits          17129    17151      +22     
+ Misses         4074     4073       -1     
  Partials        683      683              

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