feat: add C ndarray interface and refactor implementation for stats/base/dvarmpn

[DhruvArvindSingh]

Resolves None.

Description

What is the purpose of this pull request?

This pull request:

• adds C ndarray interface for stats/base/dvarmpn
• refactors JavaScript implementation
• updates tests, docs, benchmarks and examples

Related Issues

Does this pull request have any related issues?

This pull request:

• resolves None

Questions

Any questions for reviewers of this pull request?

No.

Other

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No.

Checklist

Please ensure the following tasks are completed before submitting this pull request.

• Read, understood, and followed the contributing guidelines.

---

@stdlib-js/reviewers

[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
stats/base/dvarmpn	$\color{green}383/383$ $\color{green}+100.00\%$	$\color{green}21/21$ $\color{green}+100.00\%$	$\color{green}4/4$ $\color{green}+100.00\%$	$\color{green}383/383$ $\color{green}+100.00\%$

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

[aayush0325]

also, you haven't made the required changes in README.md please refer to some of the previously merged PRs to get an idea of what changes you need to make there.

[aayush0325]

Suggested change

	STDLIB_NAPI_CREATE_DOUBLE( env, stdlib_strided_dvarmpn( N, mean, correction, X, strideX ), v );
	STDLIB_NAPI_CREATE_DOUBLE( env, API_SUFFIX(stdlib_strided_dvarmpn)( N, mean, correction, X, strideX ), v );

you'll also need to include stdlib/blas/base/shared.h

[DhruvArvindSingh]

Please verify whether we need shared.h package is needed here, as it runs without it also

[DhruvArvindSingh]

Thanks @aayush0325 for reviewing my PR.... I have made the necessary

[aayush0325]

please update this example to remove the usage of @stdlib/math/base/special/floor

[aayush0325]

same comment for all other instances

[aayush0325]

https://github.com/stdlib-js/stdlib/blob/develop/lib/node_modules/%40stdlib/stats/base/smax/README.md?plain=1#L74

see how the examples are written here for reference!

[aayush0325]

Suggested change

	float v;
	double v;

[aayush0325]

Suggested change

	v = 0.0f;
	v = 0.0;

[aayush0325]

Suggested change

	v = stdlib_strided_dvarmpn_ndarray( len, 0.0, 1, x, 1, 1 );
	v = stdlib_strided_dvarmpn_ndarray( len, 0.0, 1, x, 1, 0 );

just following the convention here

[aayush0325]

Suggested change

	const double x[] = { 1.0f, 2.0f, 3.0f, 4.0f, 5.0f, 6.0f, 7.0f, 8.0f };
	const double x[] = { 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0 };

only single precision floating-point values are suffixed with a f

[aayush0325]

Suggested change

	* //returns ~4.3333
	* // returns ~4.3333

[aayush0325]

Suggested change

	* //returns 6.25
	* // returns 6.25

[aayush0325]

Suggested change

	* //returns 6.25
	* // returns 6.25

[kgryte]

Ref: #5030