feat: add implementation of math/base/special/cfloornf

[nirmaljb]

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type: pre_commit_static_analysis_report
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Progresses #649 .

Description

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This pull request:

Related Issues

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This pull request has the following related issues:

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

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{{TODO: add disclosure if applicable}}

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@stdlib-js/reviewers

[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
math/base/special/cfloornf	$\color{green}179/179$ $\color{green}+0.00%$	$\color{green}5/5$ $\color{green}+0.00%$	$\color{green}2/2$ $\color{green}+0.00%$	$\color{green}179/179$ $\color{green}+0.00%$

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

[stdlib-bot]

⚠️ 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. For more information, see GitHub's documentation on using keywords in issues and pull requests.

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

Thank you for your contribution to the project!

[nirmaljb]

Hi @Planeshifter @kgryte, would love some feedback on this PR.

[kgryte]

@anandkaranubc Would you be able to take a look at this one as a first pass?