ADDED TWO DATA STRUCTURE ARRAY ALGORITHMS

[VeeruYadav45]

• [ 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

:x: Patch coverage is 0% with 30 lines in your changes missing coverage. Please review. :white_check_mark: Project coverage is 78.55%. Comparing base (e1773e9) to head (5656637). :warning: Report is 85 commits behind head on master.

Files with missing lines	Patch %	Lines
...ealgorithms/datastructures/arrays/PeakElement.java	0.00%	18 Missing :warning:
...gorithms/datastructures/arrays/LeadersInArray.java	0.00%	12 Missing :warning:

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #6811      +/-   ##
============================================
+ Coverage     77.85%   78.55%   +0.70%     
- Complexity     6359     6864     +505     
============================================
  Files           731      765      +34     
  Lines         21190    22680    +1490     
  Branches       4142     4489     +347     
============================================
+ Hits          16497    17817    +1320     
- Misses         4034     4150     +116     
- Partials        659      713      +54     

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[VeeruYadav45]

Hi @Shisoik , Could you please review this pull request when you have time? All checks have passed. Thanks!

[Shisoik]

I don't think I would be the right person to review this change. I contributed only once some time ago. Please ask one of the actual mainteiners to review. Thanks!

[DenizAltunkapan]

@VeeruYadav45 Please always implement the corresponding test classes to your new classes