feat: add protocol support to stats/base/varianceyc

[pulkitgupta2]

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Resolves #5692 .

Description

What is the purpose of this pull request?

This pull request:

• Refactors and adds accessor protocol support to @stdlib/stats/base/varianceyc

Related Issues

Does this pull request have any related issues?

This pull request:

• resolves [RFC]: refactor and add protocol support to stats/base/varianceyc #5692

Questions

Any questions for reviewers of this pull request?

No.

Other

Any other information relevant to this pull request? This may include screenshots, references, and/or implementation notes.

Upon reviewing the issue, I noted it references refactoring @stats/base/varianceyv, but this package doesn't exist in the repository. I've assumed this was a typographical error, and the intended target is @stats/base/varianceyc based on the context and references in the issue. I've proceeded with implementing the changes for @stats/base/varianceyc accordingly.

Checklist

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

• Read, understood, and followed the contributing guidelines.

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Coverage Report

Package	Statements	Branches	Functions	Lines
stats/base/varianceyc	$\color{red}332/336$ $\color{green}+98.81\%$	$\color{red}18/20$ $\color{green}+90.00\%$	$\color{green}3/3$ $\color{green}+100.00\%$	$\color{red}332/336$ $\color{green}+98.81\%$

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

[pulkitgupta2]

Add