feat: refactor and add protocol support to stats/base/nanmax-by

[Kaushikgtm]

Resolves #5653.

Description

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This pull request:

• {{TODO: add description describing what this pull request does}}

Related Issues

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This pull request:

• resolves [RFC]: refactor and add protocol support to stats/base/nanmax-by #5653

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Coverage Report

Package	Statements	Branches	Functions	Lines
stats/base/nanmax-by	$\color{red}329/331$ $\color{green}+99.40\%$	$\color{red}51/52$ $\color{green}+98.08\%$	$\color{green}3/3$ $\color{green}+100.00\%$	$\color{red}329/331$ $\color{green}+99.40\%$

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

[Kaushikgtm]

@kgryte please review this pr

[gururaj1512]

/stdlib merge

[kgryte]

LGTM after clean-up.