feat: add array/base/mskunary5d

[Vinit-Pandit]

Resolves #3177 .

Description

This pull request:

• Add the implementation of mskunary5d

Related Issues

Does this pull request have any related issues?

This pull request:

• resolves [RFC]: add array/base/mskunary5d #3177

Questions

Any questions for reviewers of this pull request?

In the current implementation, I have used the helper function so that max depth does not exceed 5 (lint error) and minimum changes are made compared to their previous 3D version. There are still better ways to do that like:

1. Calculating the total elements, then running a single for loop and applying the operation by calculating the index on each iteration.
2. Using recursion.
   But I am afraid to take decisions on my own by changing the way, so let me know if the implementation needs further changes.

Other

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No.

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Coverage Report

Package	Statements	Branches	Functions	Lines
array/base/mskunary5d	$\color{green}180/180$ $\color{green}+100.00\%$	$\color{green}15/15$ $\color{green}+100.00\%$	$\color{green}1/1$ $\color{green}+100.00\%$	$\color{green}180/180$ $\color{green}+100.00\%$

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

[kgryte]

/stdlib update-copyright-years

[kgryte]

Re: questions.

Calculating the total elements, then running a single for loop and applying the operation by calculating the index on each iteration.

TMK: this isn't possible to do with a single index. The inputs are nested arrays which are not necessarily contiguous in memory. If we were operating on strided arrays, you could calculate a single index and use a single for loop, but that is not the case here and helps motivate why we are creating this package in the first place.

Using recursion.

For these packages, we prefer an iterative approach for performance. We do provide a separate recursive implementation (e.g., mskunarynd) for operating on nested arrays of arbitrary dimensionality. Here, we know the dimensionality and thus prefer to use explicit for loops.

[kgryte]

/stdlib lint-autofix

[kgryte]

LGTM. Thanks, @MeastroZI, and thanks @AbhijitRaut04 for your help.