Added surface area calculation for pyramid

[KadenR789]

• 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 73.41%. Comparing base (03bb8ee) to head (1af8bba).

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 #6070 +/- ## ============================================ - Coverage 73.42% 73.41% -0.02%  Complexity 5078 5078 ============================================ Files 656 656 Lines 17617 17624 +7 Branches 3394 3395 +1 ============================================ + Hits 12936 12938 +2  - Misses 4180 4186 +6  + Partials 501 500 -1 

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[siriak]

Please fix PR checks and add JUnit tests

[github-actions]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contribution!

[github-actions]

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