feat: add C implementation for math/base/special/nanmin

[gunjjoshi]

Description

What is the purpose of this pull request?

This pull request:

• adds the C implementation for math/base/special/nanmin.

double stdlib_base_nanmin( const double x, const double y );

Related Issues

Does this pull request have any related issues?

This pull request:

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

Questions

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No.

Other

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No.

Checklist

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• Read, understood, and followed the contributing guidelines.

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@stdlib-js/reviewers

[gunjjoshi]

The CI errors look similar to what we face here: #3001 (comment)

[kgryte]

@Planeshifter Upgrading cppcheck seems to have resulted in new C lint issues resulting in CI failures where there usually wouldn't be any.

[kgryte]

LGTM. Thanks, @gunjjoshi.

I'll go ahead and merge, as it seems like the C lint error is spurious.