feat: Add Neville's Algorithm

[Keykyrios]

Description

This pull request adds Neville's algorithm, a method for polynomial interpolation. Given a set of points, it efficiently calculates the value of the interpolating polynomial at a specified x-coordinate.

Algorithm Explanation

• What is Neville's Algorithm? Neville's algorithm is an iterative method to find the value of a polynomial passing through n+1 given points. It builds up the solution by considering polynomials of increasing degrees.
• Wikipedia: https://en.wikipedia.org/wiki/Neville's_algorithm

Implementation Details

• Created Neville.java in the com.thealgorithms.maths package.
• Implemented a static interpolate method to perform the calculation.
• Added comprehensive JUnit tests in NevilleTest.java to verify correctness with linear, quadratic, and negative-valued functions. Tests for edge cases like empty or mismatched input arrays are also included.

---

• 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

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.29%. Comparing base (14a0de4) to head (88d0827).

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #6842      +/-   ##
============================================
+ Coverage     78.28%   78.29%   +0.01%     
- Complexity     6574     6580       +6     
============================================
  Files           743      744       +1     
  Lines         21895    21910      +15     
  Branches       4288     4293       +5     
============================================
+ Hits          17140    17154      +14     
  Misses         4073     4073              
- Partials        682      683       +1     

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[DenizAltunkapan]

Thank you @Keykyrios