Added surface area calculation for pyramid

[Hadis-mrd]

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

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 7 lines in your changes missing coverage. Please review.

Project coverage is 52.03%. Comparing base (648572a) to head (bb087b5).
Report is 14 commits behind head on master.

Files with missing lines	Patch %	Lines
src/main/java/com/thealgorithms/maths/Area.java	0.00%	7 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #5450      +/-   ##
============================================
- Coverage     52.05%   52.03%   -0.03%     
  Complexity     3240     3240              
============================================
  Files           524      524              
  Lines         15181    15188       +7     
  Branches       2888     2889       +1     
============================================
  Hits           7903     7903              
- Misses         6955     6962       +7     
  Partials        323      323              

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[BamaCharanChhandogi]

Fix Formatting Issue.