feat(math): Add Neville's algorithm

[Keykyrios]

Adds an implementation of Neville's Algorithm for polynomial interpolation to the math package.

Details:

• The function Neville takes slices of x and y coordinates and a target point, returning the interpolated value.
• Includes robust error handling for empty slices, mismatched slice lengths, and duplicate x-coordinates (to prevent division by zero).
• A comprehensive test suite in nevilles_test.go verifies correctness for various cases, including the new error conditions.
• Follows all GoDoc and repository style guidelines.

Reference: https://en.wikipedia.org/wiki/Neville%27s_algorithm

[github-actions]

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