feat: add math/base/special/acotf

[gunjjoshi]

Resolves #2113.

Description

What is the purpose of this pull request?

This pull request:

• adds math/base/special/acotf, which is the single-precision equivalent of math/base/special/acot.

float stdlib_base_acotf( const float x )

Related Issues

Does this pull request have any related issues?

This pull request:

• fixes [RFC]: add math/base/special/acotf #2113.

Questions

Any questions for reviewers of this pull request?

No.

Other

Any other information relevant to this pull request? This may include screenshots, references, and/or implementation notes.

• Test Coverage report:

• Since we have used "inverse cotangent" in acot , I have followed the same, instead of using "arccotangent".

• We do need to increase some tolerance, the maximum of which is 1.9 * EPS. But we get the same tolerance levels for both C and JavaScript versions.

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

[Pranavchiku]

Everything works well, this looks good, left a question above, once resolved this will be good to merge.

[kgryte]

LGTM. Thanks, @gunjjoshi and @Pranavchiku!

[kgryte]

Re: tolerance levels. They are within reason, especially given that we are comparing against double-precision implementation. What matters equally is that C and JS tolerances are the same (i.e., the implementations are observationally equivalent), which they are.

Thank you, as well, for screenshotting the coverage, as a matter of practice.

[gunjjoshi]

Understood. Thanks, @kgryte @Pranavchiku !