Add LibrarySort Implementation

[Rosander0]

• 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 algorithms include a corresponding test class that validates their functionality.
• All new code is formatted with clang-format -i --style=file path/to/your/file.java

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.86%. Comparing base (b3fcb12) to head (f9ce5c0).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #7481      +/-   ##
============================================
+ Coverage     79.83%   79.86%   +0.03%     
- Complexity     7319     7337      +18     
============================================
  Files           805      808       +3     
  Lines         23785    23845      +60     
  Branches       4680     4694      +14     
============================================
+ Hits          18989    19045      +56     
- Misses         4036     4037       +1     
- Partials        760      763       +3     

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[Copilot]

Pull request overview

Adds a new LibrarySort implementation under com.thealgorithms.sorts, along with a dedicated JUnit test class to validate basic behavior.

Changes:

• Introduces LibrarySort sorting implementation and API (LibrarySort.sort(int[])).
• Adds LibrarySortTest with basic correctness and input-validation tests (including null input).

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
src/main/java/com/thealgorithms/sorts/LibrarySort.java	Adds the new sorting implementation and its Javadoc/API.
src/test/java/com/thealgorithms/sorts/LibrarySortTest.java	Adds unit tests covering common input shapes and null handling.

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