feat: add stats/base/ndarray/snanstdev

[aryan7071]

---

type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes. report:

• task: lint_filenames status: passed
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• task: lint_typescript_declarations status: passed
• task: lint_typescript_tests status: passed
• task: lint_license_headers status: passed ---

Description

What is the purpose of this pull request?

This pull request:

• add stats/base/ndarray/snanstdev

Related Issues

Does this pull request have any related issues?

This pull request has the following related issues:

• #{{TODO: add related issue number}}

Questions

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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.

AI Assistance

When authoring the changes proposed in this PR, did you use any kind of AI assistance?

• Yes
• No

@stdlib-js/reviewers

[aryan7071]

/stdlib update-copyright-years

[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
stats/base/ndarray/snanstdev	$\color{green}110/110$ $\color{green}+0.00%$	$\color{green}3/3$ $\color{green}+0.00%$	$\color{green}1/1$ $\color{green}+0.00%$	$\color{green}110/110$ $\color{green}+0.00%$

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

[Planeshifter]

This PR currently has a critical bug.

[aryan7071]

Understood. Updated snanstdev to accept a second zero-dimensional ndarray specifying the degrees of freedom adjustment (correction), and now pass it correctly to snanstdevpn.ndarray.

Updated JSDoc, TypeScript definitions, REPL docs, tests, and benchmarks to reflect the corrected API and verify the actual computed standard deviation values.