feat: add stats/incr/nanmape

[hrshya]

Resolves #5565 .

Description

What is the purpose of this pull request?

This pull request:

• adds stats/incr/nanmape .

Related Issues

Does this pull request have any related issues?

This pull request:

• progresses [RFC]: add incremental accumulators for handling NaN values in stats/incr/* (tracking issue) #5966 .

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.

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@stdlib-js/reviewers

[stdlib-bot]

Hello! 👋

We've noticed that you've been opening a number of PRs addressing good first issues. Thank you for your interest and enthusiasm!

Now that you've made a few contributions, we suggest no longer working on good first issues. Instead, we encourage you to prioritize cleaning up any PRs which have yet to be merged and then proceed to work on more involved tasks.

Not only does this ensure that other new contributors can work on things and get ramped up on all things stdlib, it also ensures that you can spend your time on more challenging problems. 🚀

For ideas for future PRs, feel free to search the codebase for TODOs and FIXMEs and be sure to check out other open issues on the issue tracker. Cheers!

[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
stats/incr/nanmape	$\color{green}129/129$ $\color{green}+100.00\%$	$\color{green}8/8$ $\color{green}+100.00\%$	$\color{green}2/2$ $\color{green}+100.00\%$	$\color{green}129/129$ $\color{green}+100.00\%$

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

[kgryte]

Same changes as in #6021