feat: add C implementation for @stdlib/stats/base/dists/poisson/entropy

[rautelaKamal]

Closes #3786

Description

This pull request adds a native C implementation for @stdlib/stats/base/dists/poisson/entropy.

Related Issues

• Resolves [RFC]: Add C implementation for @stdlib/stats/base/dists/poisson/entropy #3786

Questions

No.

Other

No.

Checklist

• Read, understood, and followed the contributing guidelines

AI Assistance

• Yes

How AI was used:

• Research and understanding

Disclosure

I consulted AI tools to understand the codebase and the existing JavaScript implementation patterns, but the proposed C implementation changes were authored manually by myself.

@stdlib-js/reviewers

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Coverage Report

Package	Statements	Branches	Functions	Lines
blas/ext/base	$\color{red}59225/70981$ $\color{green}+83.44%$	$\color{red}1066/1209$ $\color{green}+88.17%$	$\color{red}20/601$ $\color{green}+3.33%$	$\color{red}59225/70981$ $\color{green}+83.44%$
blas/ext/base/ndarray	$\color{red}8859/9468$ $\color{green}+93.57%$	$\color{red}153/155$ $\color{green}+98.71%$	$\color{red}0/77$ $\color{green}+0.00%$	$\color{red}8859/9468$ $\color{green}+93.57%$
stats/base/dists/poisson/entropy	$\color{green}204/204$ $\color{green}+0.00%$	$\color{green}12/12$ $\color{green}+0.00%$	$\color{green}4/4$ $\color{green}+0.00%$	$\color{green}204/204$ $\color{green}+0.00%$

The above coverage report was generated for the changes in this PR.