feat: add support for secant functionality math/base/special/sec

[AbhijitRaut04]

Resolves #225

Add the secant functionality using the existing cosine and sine functions.

The PR fullfills the purpose of calculating secant of a number.

This pull request:

• is able to calculate secant of a number.

This pull request:

• resolves RFC: add support for computing the secant (sec) #225

Questions

What modifications should I make for this PR ?

Checklist

• Read, understood, and followed the contributing guidelines

@stdlib-js/reviewers

@kgryte
@Planeshifter

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[AbhijitRaut04]

@kgryte Are there any changes required?

[kgryte]

This doesn't actually point to the original implementation. This link is for kernel tan, not sec.

[kgryte]

@AbhijitRaut04 I have no idea where you got the implementation. It looks like you copied from some other package. The implementation for this package should be trivial and is explicitly provided in #225.

As such, this package needs several changes.

[kgryte]

Furthermore, given that tests and benchmarks are failing, it seems evident that you have not setup your local dev environment for linting, running tests, and running benchmarks. Please consult our contributing guide and our development guide.