feat: add C implementation for math/base/assert/is-coprime

[vivekmaurya001]

Resolves None.

Description

• adds C implementation for @stdlib/math/base/assert/is-coprime along with relevant tests, benchmarks and examples

This pull request:

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Checklist

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• Read, understood, and followed the contributing guidelines

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[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
math/base/assert/is-coprime	$\color{green}149/149$ $\color{green}+100.00\%$	$\color{green}7/7$ $\color{green}+100.00\%$	$\color{green}2/2$ $\color{green}+100.00\%$	$\color{green}149/149$ $\color{green}+100.00\%$

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

[vivekmaurya001]

@kgryte , ready for reveiw