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 :warning:

Additional details and impacted files

```diff @@ 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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