Refactor error handling and calculations in TheilU, Wmape, and TukeyBiweight classes; update buffer handling for consistency

- Updated buffer handling in TheilU and Wmape classes to ensure consistency after adding new values.
- Changed the resync interval constant in TukeyBiweight for better clarity.
- Refactored state structures to record structs in Gauss, Hann, Hp, Hpf, Kalman, Loess, Notch, and other filter classes for improved performance and readability.
- Enhanced numerical stability in Mama class calculations using Fused Multiply-Add (FMA) for precision.
- Added comprehensive tests for Atan2 validation to compare .NET's Math.Atan2 with PineScript's implementation, ensuring accuracy across various edge cases.
- Updated NDepend badges to reflect changes in classes, methods, and lines of code.

ndepend/badges/classes.svg

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-    <title># Classes: 661</title>
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ndepend/badges/comments.svg

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-    <title>Percentage of Comments: 30.23</title>
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ndepend/badges/complexity.svg

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ndepend/badges/files.svg

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ndepend/badges/loc.svg

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ndepend/badges/methods.svg

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ndepend/badges/public-api.svg

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