[Math] add multiple derivative estimator

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Workflow report

workflow report corresponding to commit a86c43a
Commiter email is timothee.davidcleris@proton.me

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Test pipeline can run.

Clang-tidy diff report

No relevant changes found.
Well done!

You should now go back to your normal life and enjoy a hopefully sunny day while waiting for the review.

Doxygen diff with main

Removed warnings : 3
New warnings : 1
Warnings count : 5693 → 5691 (-0.0%)

Detailed changes :

- src/shammath/include/shammath/derivatives.hpp:24: warning: Member derivative_upwind(T x, T dx, std::function< T(T)> &&fct) (function) of namespace shammath is not documented.
- src/shammath/include/shammath/derivatives.hpp:24: warning: Member derivative_upwind(T x, T dx, std::function< T(T)> &&fct) (function) of namespace shammath is not documented.
- src/shampylib/src/math/pyshammath.cpp:23: warning: Member Register_pymod(pysham_mathinit) (function) of file pyshammath.cpp is not documented.
+ src/shampylib/src/math/pyshammath.cpp:29: warning: Member Register_pymod(pysham_mathinit) (function) of file pyshammath.cpp is not documented.