feat: add math/base/special/roundsd

[ShabiShett07]

Resolves #649 .

Description

What is the purpose of this pull request?

This pull request:

• Resolves part of [RFC]: Add C implementations to base special math functions (tracking issue) #649 by adding math/base/special/roundsds

Related Issues

Does this pull request have any related issues?

This pull request:

• resolves [RFC]: Add C implementations to base special math functions (tracking issue) #649

Questions

Any questions for reviewers of this pull request?

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]

Coverage Report

Package	Statements	Branches	Functions	Lines
math/base/special/roundsd	$\color{green}169/169$ $\color{green}+100.00\%$	$\color{green}30/30$ $\color{green}+100.00\%$	$\color{green}1/1$ $\color{green}+100.00\%$	$\color{green}169/169$ $\color{green}+100.00\%$

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

[ShabiShett07]

/stdlib check-files

[ShabiShett07]

/stdlib update-copyright-years

[ShabiShett07]

/stdlib lint-autofix

[Planeshifter]

⚠️ Tracking Issue Closure Warning ⚠️

I noticed your PR description contains closing keywords ("Resolves", "Closes", or "Fixes") referencing a "Tracking Issue".

Why this matters:
Tracking issues should typically remain open until all related sub-issues are completed. GitHub automatically closes issues with such closing keywords when the PR is merged.

Required action:
Use "Progresses:" or "Ref:" instead to reference the tracking issue without automatically closing it.

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