feat: add math/base/special/sincosdf

[ByteKnight28]

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Resolves a part of #649 .

Description

What is the purpose of this pull request?

This pull request:

• Adds math/base/special/sincosdf

Related Issues

Does this pull request have any related issues?

This pull request has the following related issues:

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

Questions

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No.

Other

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No.

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• Read, understood, and followed the contributing guidelines.

AI Assistance

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[Planeshifter]

Thanks for your first PR! Left initial comments.

[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
math/base/special/sincosdf	$\color{green}252/252$ $\color{green}+100.00%$	$\color{green}7/7$ $\color{green}+100.00%$	$\color{green}3/3$ $\color{green}+100.00%$	$\color{green}252/252$ $\color{green}+100.00%$

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

[Planeshifter]

Should be getting close.

[Planeshifter]

Let's get this PR in. Thank you for your first PR!

[stdlib-bot]

PR Commit Message

feat: add `math/base/special/sincosdf`

PR-URL: https://github.com/stdlib-js/stdlib/pull/9822
Ref: https://github.com/stdlib-js/stdlib/issues/649

Co-authored-by: Philipp Burckhardt <pburckhardt@outlook.com>
Reviewed-by: Philipp Burckhardt <pburckhardt@outlook.com>
Signed-off-by: ByteKnight28 <shsuasud@gmail.com>
Signed-off-by: Philipp Burckhardt <pburckhardt@outlook.com>
Signed-off-by: Shantanu Kharwar <shsuasud@gmail.com>

Please review the above commit message and make any necessary adjustments.

⚠️ Action Required: This PR references tracking issues. Please update the PR description to replace any "Closes", "Fixes", or "Resolves" keywords with "Ref" when referencing these issues.