feat: add accessor protocol support and refactor stats/base/nanmeanors

[rahulptl165]

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Resolves #5656

Description

What is the purpose of this pull request?

This pull request:

• adds accessor protocol support to stats/base/nanmeanors

Related Issues

Does this pull request have any related issues?

This pull request:

• resolves [RFC]: refactor and add protocol support to stats/base/nanmeanors #5656

Questions

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No.

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No.

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
stats/base/nanmeanors	$\color{green}273/273$ $\color{green}+100.00\%$	$\color{green}26/26$ $\color{green}+100.00\%$	$\color{green}3/3$ $\color{green}+100.00\%$	$\color{green}273/273$ $\color{green}+100.00\%$

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

[aayush0325]

looking good overall but a couple of changes

1. kindly make the changes in examples in your lib/index.js file if applicable
2. kindly follow our file structure, your lib directory should only have an index.js, accessors.js, main.js and ndarray.js kindly see some of our existing packages for reference

[rahulptl165]

Hi @aayush0325 , I have refactored lib's folder files to match existing structure and refactor examples in index.js. let me know if you need any further changes

[kgryte]

/stdlib merge

[kgryte]

LGTM